Add confirmation dialog to checkoutHead
Add confirmation dialog to checkoutHead

There have been a few reports of files mysteriously going back to the
last version in the tree. My theory is that it is because of people
fat-fingering the Undo command because the default keyboard mapping is
too similar. This will at least prevent most accidental data loss.

MjAbuz/atom,jtrose2/atom,kevinrenaers/atom,h0dgep0dge/atom,kittens/atom,dijs/atom,batjko/atom,bryonwinger/atom,yalexx/atom,vjeux/atom,rjattrill/atom,synaptek/atom,DiogoXRP/atom,Shekharrajak/atom,bolinfest/atom,ralphtheninja/atom,pengshp/atom,g2p/atom,originye/atom,jtrose2/atom,tony612/atom,kandros/atom,jtrose2/atom,dsandstrom/atom,prembasumatary/atom,0x73/atom,n-riesco/atom,ashneo76/atom,pombredanne/atom,liuderchi/atom,AdrianVovk/substance-ide,omarhuanca/atom,hpham04/atom,beni55/atom,ivoadf/atom,burodepeper/atom,bencolon/atom,qskycolor/atom,fang-yufeng/atom,sillvan/atom,jjz/atom,elkingtonmcb/atom,hakatashi/atom,rmartin/atom,einarmagnus/atom,me-benni/atom,targeter21/atom,john-kelly/atom,amine7536/atom,mostafaeweda/atom,woss/atom,Hasimir/atom,transcranial/atom,stinsonga/atom,fscherwi/atom,beni55/atom,brettle/atom,KENJU/atom,Austen-G/BlockBuilder,synaptek/atom,hakatashi/atom,bcoe/atom,basarat/atom,mnquintana/atom,rmartin/atom,hagb4rd/atom,KENJU/atom,cyzn/atom,qskycolor/atom,sekcheong/atom,Galactix/atom,n-riesco/atom,chengky/atom,GHackAnonymous/atom,ardeshirj/atom,yomybaby/atom,vcarrera/atom,Andrey-Pavlov/atom,SlimeQ/atom,nvoron23/atom,jlord/atom,ppamorim/atom,Klozz/atom,brettle/atom,n-riesco/atom,sekcheong/atom,ralphtheninja/atom,andrewleverette/atom,ObviouslyGreen/atom,yamhon/atom,palita01/atom,ironbox360/atom,ykeisuke/atom,dkfiresky/atom,Galactix/atom,einarmagnus/atom,svanharmelen/atom,johnhaley81/atom,niklabh/atom,svanharmelen/atom,synaptek/atom,vhutheesing/atom,sxgao3001/atom,sxgao3001/atom,yamhon/atom,Jandersolutions/atom,rsvip/aTom,acontreras89/atom,vinodpanicker/atom,vhutheesing/atom,kdheepak89/atom,PKRoma/atom,AlisaKiatkongkumthon/atom,tanin47/atom,KENJU/atom,woss/atom,001szymon/atom,yalexx/atom,einarmagnus/atom,atom/atom,woss/atom,bcoe/atom,constanzaurzua/atom,atom/atom,Jandersoft/atom,lisonma/atom,rxkit/atom,batjko/atom,splodingsocks/atom,liuderchi/atom,johnrizzo1/atom,harshdattani/atom,ObviouslyGreen/atom,synaptek/atom,splodingsocks/atom,dsandstrom/atom,dkfiresky/atom,paulcbetts/atom,vinodpanicker/atom,rmartin/atom,fredericksilva/atom,sebmck/atom,mrodalgaard/atom,crazyquark/atom,brumm/atom,hagb4rd/atom,ali/atom,medovob/atom,vcarrera/atom,fang-yufeng/atom,andrewleverette/atom,oggy/atom,champagnez/atom,fedorov/atom,omarhuanca/atom,oggy/atom,pengshp/atom,ralphtheninja/atom,hagb4rd/atom,bj7/atom,bj7/atom,RobinTec/atom,pkdevbox/atom,basarat/atom,jacekkopecky/atom,mdumrauf/atom,Dennis1978/atom,Dennis1978/atom,andrewleverette/atom,russlescai/atom,t9md/atom,kevinrenaers/atom,ppamorim/atom,BogusCurry/atom,tisu2tisu/atom,ezeoleaf/atom,scippio/atom,Mokolea/atom,Hasimir/atom,kittens/atom,Abdillah/atom,dkfiresky/atom,001szymon/atom,acontreras89/atom,bolinfest/atom,YunchengLiao/atom,pombredanne/atom,ironbox360/atom,targeter21/atom,jeremyramin/atom,basarat/atom,Galactix/atom,seedtigo/atom,nrodriguez13/atom,kdheepak89/atom,kdheepak89/atom,tjkr/atom,Galactix/atom,lisonma/atom,RobinTec/atom,jlord/atom,devmario/atom,abcP9110/atom,alexandergmann/atom,mostafaeweda/atom,decaffeinate-examples/atom,rxkit/atom,panuchart/atom,hpham04/atom,scippio/atom,john-kelly/atom,Jonekee/atom,Neron-X5/atom,ardeshirj/atom,fscherwi/atom,Austen-G/BlockBuilder,tanin47/atom,codex8/atom,woss/atom,isghe/atom,Ju2ender/atom,RuiDGoncalves/atom,ivoadf/atom,constanzaurzua/atom,hpham04/atom,originye/atom,Austen-G/BlockBuilder,john-kelly/atom,pkdevbox/atom,seedtigo/atom,jacekkopecky/atom,constanzaurzua/atom,AdrianVovk/substance-ide,codex8/atom,florianb/atom,jacekkopecky/atom,lisonma/atom,Rychard/atom,ObviouslyGreen/atom,Ju2ender/atom,charleswhchan/atom,AlexxNica/atom,qiujuer/atom,folpindo/atom,decaffeinate-examples/atom,matthewclendening/atom,daxlab/atom,h0dgep0dge/atom,scv119/atom,daxlab/atom,rlugojr/atom,AlisaKiatkongkumthon/atom,scv119/atom,BogusCurry/atom,bryonwinger/atom,darwin/atom,ezeoleaf/atom,Jandersolutions/atom,Austen-G/BlockBuilder,Jdesk/atom,xream/atom,nucked/atom,fedorov/atom,davideg/atom,Dennis1978/atom,GHackAnonymous/atom,crazyquark/atom,johnhaley81/atom,githubteacher/atom,vcarrera/atom,alexandergmann/atom,G-Baby/atom,phord/atom,gontadu/atom,FoldingText/atom,jacekkopecky/atom,oggy/atom,phord/atom,brumm/atom,me6iaton/atom,helber/atom,hharchani/atom,kandros/atom,RuiDGoncalves/atom,MjAbuz/atom,PKRoma/atom,bsmr-x-script/atom,wiggzz/atom,boomwaiza/atom,mertkahyaoglu/atom,hpham04/atom,sekcheong/atom,GHackAnonymous/atom,nrodriguez13/atom,charleswhchan/atom,folpindo/atom,Jandersolutions/atom,paulcbetts/atom,Andrey-Pavlov/atom,targeter21/atom,0x73/atom,darwin/atom,amine7536/atom,mnquintana/atom,Rodjana/atom,g2p/atom,matthewclendening/atom,amine7536/atom,gisenberg/atom,prembasumatary/atom,splodingsocks/atom,ilovezy/atom,jlord/atom,amine7536/atom,kaicataldo/atom,Klozz/atom,hakatashi/atom,gisenberg/atom,gisenberg/atom,mrodalgaard/atom,kc8wxm/atom,palita01/atom,devoncarew/atom,001szymon/atom,jjz/atom,gontadu/atom,Ingramz/atom,FoldingText/atom,kjav/atom,amine7536/atom,jlord/atom,AlexxNica/atom,h0dgep0dge/atom,ReddTea/atom,gzzhanghao/atom,burodepeper/atom,lovesnow/atom,decaffeinate-examples/atom,Jdesk/atom,DiogoXRP/atom,bryonwinger/atom,sekcheong/atom,Klozz/atom,lovesnow/atom,yalexx/atom,0x73/atom,elkingtonmcb/atom,chfritz/atom,fredericksilva/atom,gisenberg/atom,russlescai/atom,darwin/atom,CraZySacX/atom,isghe/atom,lisonma/atom,tisu2tisu/atom,g2p/atom,toqz/atom,FIT-CSE2410-A-Bombs/atom,chengky/atom,mnquintana/atom,mnquintana/atom,dsandstrom/atom,gisenberg/atom,rsvip/aTom,FIT-CSE2410-A-Bombs/atom,harshdattani/atom,targeter21/atom,ezeoleaf/atom,vcarrera/atom,Shekharrajak/atom,PKRoma/atom,FoldingText/atom,G-Baby/atom,hellendag/atom,gabrielPeart/atom,rjattrill/atom,ykeisuke/atom,abcP9110/atom,vjeux/atom,CraZySacX/atom,Mokolea/atom,pombredanne/atom,daxlab/atom,bencolon/atom,sillvan/atom,ykeisuke/atom,chfritz/atom,yangchenghu/atom,tmunro/atom,yomybaby/atom,scv119/atom,johnhaley81/atom,mnquintana/atom,tisu2tisu/atom,nrodriguez13/atom,splodingsocks/atom,Shekharrajak/atom,0x73/atom,Huaraz2/atom,Sangaroonaom/atom,kandros/atom,kdheepak89/atom,fang-yufeng/atom,alfredxing/atom,qskycolor/atom,champagnez/atom,bsmr-x-script/atom,liuxiong332/atom,yomybaby/atom,githubteacher/atom,codex8/atom,Hasimir/atom,nucked/atom,mostafaeweda/atom,tony612/atom,dkfiresky/atom,yalexx/atom,jeremyramin/atom,batjko/atom,SlimeQ/atom,ashneo76/atom,jjz/atom,Locke23rus/atom,phord/atom,anuwat121/atom,Ingramz/atom,hellendag/atom,me6iaton/atom,basarat/atom,liuderchi/atom,sotayamashita/atom,CraZySacX/atom,vinodpanicker/atom,charleswhchan/atom,acontreras89/atom,hakatashi/atom,liuxiong332/atom,russlescai/atom,kaicataldo/atom,matthewclendening/atom,lpommers/atom,stinsonga/atom,hharchani/atom,pombredanne/atom,Abdillah/atom,devmario/atom,devoncarew/atom,pkdevbox/atom,acontreras89/atom,rsvip/aTom,isghe/atom,Ju2ender/atom,russlescai/atom,sekcheong/atom,Jonekee/atom,deepfox/atom,AlexxNica/atom,Jandersolutions/atom,kc8wxm/atom,me-benni/atom,devoncarew/atom,qiujuer/atom,gontadu/atom,Sangaroonaom/atom,pengshp/atom,AlbertoBarrago/atom,fedorov/atom,RuiDGoncalves/atom,hharchani/atom,YunchengLiao/atom,burodepeper/atom,vhutheesing/atom,deepfox/atom,stinsonga/atom,sebmck/atom,toqz/atom,panuchart/atom,liuxiong332/atom,boomwaiza/atom,Ingramz/atom,prembasumatary/atom,Jdesk/atom,dannyflax/atom,Jdesk/atom,FoldingText/atom,jjz/atom,yomybaby/atom,bcoe/atom,YunchengLiao/atom,davideg/atom,atom/atom,tmunro/atom,sxgao3001/atom,sebmck/atom,liuxiong332/atom,jordanbtucker/atom,crazyquark/atom,tjkr/atom,Ju2ender/atom,alfredxing/atom,rlugojr/atom,ali/atom,deepfox/atom,toqz/atom,githubteacher/atom,basarat/atom,chengky/atom,kittens/atom,AlbertoBarrago/atom,kc8wxm/atom,efatsi/atom,alfredxing/atom,batjko/atom,oggy/atom,avdg/atom,kjav/atom,Neron-X5/atom,jlord/atom,davideg/atom,me-benni/atom,GHackAnonymous/atom,batjko/atom,yangchenghu/atom,chfritz/atom,fscherwi/atom,ReddTea/atom,dijs/atom,synaptek/atom,fang-yufeng/atom,deepfox/atom,dsandstrom/atom,stinsonga/atom,ali/atom,jordanbtucker/atom,transcranial/atom,Sangaroonaom/atom,svanharmelen/atom,rookie125/atom,xream/atom,Arcanemagus/atom,Andrey-Pavlov/atom,codex8/atom,sxgao3001/atom,prembasumatary/atom,Shekharrajak/atom,niklabh/atom,lpommers/atom,bcoe/atom,liuxiong332/atom,john-kelly/atom,transcranial/atom,avdg/atom,florianb/atom,Austen-G/BlockBuilder,kdheepak89/atom,deoxilix/atom,devoncarew/atom,Abdillah/atom,qskycolor/atom,Andrey-Pavlov/atom,kaicataldo/atom,Jandersoft/atom,abcP9110/atom,efatsi/atom,bsmr-x-script/atom,mostafaeweda/atom,mertkahyaoglu/atom,ilovezy/atom,rsvip/aTom,boomwaiza/atom,originye/atom,ReddTea/atom,deepfox/atom,vinodpanicker/atom,stuartquin/atom,medovob/atom,mertkahyaoglu/atom,efatsi/atom,nvoron23/atom,Jandersolutions/atom,jeremyramin/atom,chengky/atom,hagb4rd/atom,vcarrera/atom,G-Baby/atom,scv119/atom,paulcbetts/atom,cyzn/atom,rxkit/atom,fedorov/atom,n-riesco/atom,devmario/atom,Hasimir/atom,h0dgep0dge/atom,gabrielPeart/atom,Austen-G/BlockBuilder,anuwat121/atom,xream/atom,Locke23rus/atom,davideg/atom,devoncarew/atom,palita01/atom,kittens/atom,jordanbtucker/atom,Rodjana/atom,lpommers/atom,matthewclendening/atom,Mokolea/atom,t9md/atom,nvoron23/atom,rookie125/atom,isghe/atom,t9md/atom,qskycolor/atom,cyzn/atom,ali/atom,decaffeinate-examples/atom,qiujuer/atom,SlimeQ/atom,vinodpanicker/atom,ReddTea/atom,niklabh/atom,sebmck/atom,Rodjana/atom,fredericksilva/atom,russlescai/atom,tony612/atom,n-riesco/atom,kittens/atom,beni55/atom,lovesnow/atom,tanin47/atom,toqz/atom,helber/atom,hagb4rd/atom,champagnez/atom,sillvan/atom,hellendag/atom,Neron-X5/atom,mdumrauf/atom,Arcanemagus/atom,RobinTec/atom,Neron-X5/atom,bcoe/atom,ironbox360/atom,Neron-X5/atom,MjAbuz/atom,florianb/atom,ali/atom,ppamorim/atom,DiogoXRP/atom,wiggzz/atom,crazyquark/atom,dannyflax/atom,alexandergmann/atom,ilovezy/atom,ReddTea/atom,mrodalgaard/atom,kjav/atom,FoldingText/atom,scippio/atom,jacekkopecky/atom,crazyquark/atom,dsandstrom/atom,brettle/atom,sotayamashita/atom,devmario/atom,codex8/atom,jtrose2/atom,nvoron23/atom,bryonwinger/atom,avdg/atom,KENJU/atom,deoxilix/atom,fredericksilva/atom,Abdillah/atom,rookie125/atom,NunoEdgarGub1/atom,abcP9110/atom,omarhuanca/atom,KENJU/atom,ppamorim/atom,omarhuanca/atom,chengky/atom,Jandersoft/atom,rjattrill/atom,bencolon/atom,BogusCurry/atom,woss/atom,gzzhanghao/atom,vjeux/atom,Andrey-Pavlov/atom,MjAbuz/atom,SlimeQ/atom,Ju2ender/atom,davideg/atom,GHackAnonymous/atom,kc8wxm/atom,tjkr/atom,Jdesk/atom,panuchart/atom,Rychard/atom,fredericksilva/atom,hharchani/atom,kjav/atom,qiujuer/atom,stuartquin/atom,florianb/atom,hharchani/atom,helber/atom,einarmagnus/atom,rjattrill/atom,YunchengLiao/atom,rmartin/atom,vjeux/atom,dkfiresky/atom,brumm/atom,stuartquin/atom,wiggzz/atom,elkingtonmcb/atom,Galactix/atom,Locke23rus/atom,sillvan/atom,RobinTec/atom,dannyflax/atom,prembasumatary/atom,sebmck/atom,MjAbuz/atom,omarhuanca/atom,ppamorim/atom,gzzhanghao/atom,AdrianVovk/substance-ide,SlimeQ/atom,AlbertoBarrago/atom,pombredanne/atom,NunoEdgarGub1/atom,Rychard/atom,yamhon/atom,yalexx/atom,isghe/atom,jacekkopecky/atom,sxgao3001/atom,vjeux/atom,paulcbetts/atom,basarat/atom,dannyflax/atom,ilovezy/atom,FoldingText/atom,NunoEdgarGub1/atom,dannyflax/atom,me6iaton/atom,kjav/atom,constanzaurzua/atom,Jandersoft/atom,abcP9110/atom,sillvan/atom,toqz/atom,liuderchi/atom,Huaraz2/atom,harshdattani/atom,sotayamashita/atom,deoxilix/atom,oggy/atom,tony612/atom,matthewclendening/atom,Shekharrajak/atom,charleswhchan/atom,ezeoleaf/atom,yangchenghu/atom,Jonekee/atom,ivoadf/atom,Huaraz2/atom,johnrizzo1/atom,bolinfest/atom,kevinrenaers/atom,AlisaKiatkongkumthon/atom,medovob/atom,constanzaurzua/atom,fang-yufeng/atom,YunchengLiao/atom,mostafaeweda/atom,johnrizzo1/atom,fedorov/atom,RobinTec/atom,jjz/atom,lovesnow/atom,nucked/atom,devmario/atom,mdumrauf/atom,seedtigo/atom,Abdillah/atom,ashneo76/atom,nvoron23/atom,john-kelly/atom,dijs/atom,mertkahyaoglu/atom,anuwat121/atom,lovesnow/atom,charleswhchan/atom,Jandersoft/atom,qiujuer/atom,hpham04/atom,tmunro/atom,kc8wxm/atom,mertkahyaoglu/atom,Hasimir/atom,rmartin/atom,NunoEdgarGub1/atom,acontreras89/atom,rsvip/aTom,me6iaton/atom,rlugojr/atom,gabrielPeart/atom,lisonma/atom,targeter21/atom,folpindo/atom,tony612/atom,yomybaby/atom,NunoEdgarGub1/atom,bj7/atom,jtrose2/atom,einarmagnus/atom,florianb/atom,me6iaton/atom,Arcanemagus/atom,FIT-CSE2410-A-Bombs/atom,ilovezy/atom,ardeshirj/atom,dannyflax/atom