Fix scrolling of pageup/pagedown, make them move a little less than a screen
Fix scrolling of pageup/pagedown, make them move a little less than a screen

Closes #1290

InternetGuru/CodeMirror,djadmin/CodeMirror,happibum/CodeMirror-main,symbla/CodeMirror,CartoDB/CodeMirror,dperetti/CodeMirror,qiankun007/CodeMirror,fpco/codemirror,systay/CodeMirror,gkoberger/CodeMirror,Carreau/CodeMirror,karthikeyansam/CodeMirror,supriyantomaftuh/CodeMirror,jayaprabhakar/CodeMirror,codio/CodeMirror,wingify/CodeMirror,Allenice/CodeMirror,flyskyko/CodeMirror,nightwing/CodeMirror,ThebingServices/CodeMirror,flyskyko/CodeMirror,vanloswang/CodeMirror,jessegrosjean/CodeMirror,nawroth/CodeMirror,crazy4chrissi/CodeMirror,ficristo/CodeMirror,morrisonwudi/CodeMirror,Ermlab/CodeMirror,KamranMackey/CodeMirror,cben/CodeMirror,melpon/CodeMirror,nawroth/CodeMirror,rasata/CodeMirror,AlanWasTaken/codemirror,sourcelair/CodeMirror,INTELOGIE/CodeMirror,loopspace/CodeMirror,isdampe/CodeMirror,elisee/CodeMirror,philuchansky/CodeMirror,bluesh55/CodeMirror,jpolitz/CodeMirror,NumbersInternational/CodeMirror,supriyantomaftuh/CodeMirror,ksanaforge/CodeMirror,vanloswang/CodeMirror,schanzer/CodeMirror,notepadqq/CodeMirror,bluesh55/CodeMirror,abdelouahabb/CodeMirror,sourcelair/CodeMirror,bocharsky-bw/CodeMirror,cintiamh/CodeMirror,SidPresse/CodeMirror,TechnicalPursuit/CodeMirror,Ermlab/CodeMirror,DustinH/CodeMirror,manderson23/CodeMirror,amshali/CodeMirror,dbarnett/CodeMirror,kolya-ay/CodeMirror,kuangyeheng/CodeMirror,amsul/CodeMirror,Allenice/CodeMirror,buchslava/CodeMirror,matthewbauer/CodeMirror,buchslava/CodeMirror,ficristo/CodeMirror,pinbe/CodeMirror,karevn/CodeMirror,axter/CodeMirror,fivetran/CodeMirror,kk9599/CodeMirror,NeZaMy/CodeMirror2,NumbersInternational/CodeMirror,apatawari/CodeMirror,ejgallego/CodeMirror,philuchansky/CodeMirror,r7kamura/CodeMirror,rasata/CodeMirror,qweasd1/CodeMirror,skylarkcob/CodeMirror,schanzer/CodeMirror,adobe/CodeMirror2,ZombieHippie/CodeMirror,trumanliu/CodeMirror,d0liver/CodeMirror,karthikeyansam/CodeMirror,ThebingServices/CodeMirror,flyskyko/CodeMirror,mihailik/CodeMirror,vanloswang/CodeMirror,TechnicalPursuit/CodeMirror,hackmdio/CodeMirror,ZombieHippie/CodeMirror,Dominator008/CodeMirror,SidPresse/CodeMirror,alur/CodeMirror,hccampos/CodeMirror,webida/CodeMirror,sekcheong/CodeMirror,Jisuanke/CodeMirror,TDaglis/CodeMirror,pabloferz/CodeMirror,morrisonwudi/CodeMirror,ssxxue/CodeMirror,fmoliveira/CodeMirror,jayaprabhakar/CodeMirror,pinbe/CodeMirror,ejgallego/CodeMirror,anthonygego/CodeMirror,anthonygego/CodeMirror,symbla/CodeMirror,pjkui/CodeMirror,loopspace/CodeMirror,bocharsky-bw/CodeMirror,INTELOGIE/CodeMirror,kerabromsmu/CodeMirror,MarcelGerber/CodeMirror,jochenberger/CodeMirror,isdampe/CodeMirror,kerabromsmu/CodeMirror,vincentwoo/CodeMirror,r7kamura/CodeMirror,kevinushey/CodeMirror,ashmind/CodeMirror,ksanaforge/CodeMirror,antimatter15/CodeMirror,notepadqq/CodeMirror,davidpham87/CodeMirror,sanyaade-iot/CodeMirror,fmoliveira/CodeMirror,EasonYi/CodeMirror,kerabromsmu/CodeMirror,sgoo/CodeMirror,vincentwoo/CodeMirror,isdampe/CodeMirror,thomasjm/CodeMirror,bfrohs/CodeMirror,increpare/CodeMirror,SidPresse/CodeMirror,xeronith/CodeMirror,rrandom/CodeMirror,davidpham87/CodeMirror,jhnesk/CodeMirror,jessegrosjean/CodeMirror,grzegorzmazur/CodeMirror,shiren/CodeMirror,nightwing/CodeMirror,belph/CodeMirror,amshali/CodeMirror,namin/CodeMirror,happibum/CodeMirror-main,abdelouahabb/CodeMirror,systay/CodeMirror,MarcelGerber/CodeMirror,dbarnett/CodeMirror,EasonYi/CodeMirror,angelozerr/CodeMirror,camellhf/CodeMirror,webida/CodeMirror,michaelerobertsjr/CodeMirror,webida/CodeMirror,trumanliu/CodeMirror,jkaplon/CodeMirror,codio/CodeMirror,hackmdio/CodeMirror,Allenice/CodeMirror,namin/CodeMirror,kk9599/CodeMirror,belph/CodeMirror,karevn/CodeMirror,hccampos/CodeMirror,gkoberger/CodeMirror,TechnicalPursuit/CodeMirror,xeronith/CodeMirror,adobe/CodeMirror2,dudb/CodeMirror,grzegorzmazur/CodeMirror,philuchansky/CodeMirror,dudb/CodeMirror,rrandom/CodeMirror,d0liver/CodeMirror,Icenium/CodeMirror,fpco/codemirror,camellhf/CodeMirror,GerHobbelt/CodeMirror2,Icenium/CodeMirror,hccampos/CodeMirror,sourcelair/CodeMirror,Carreau/CodeMirror,camellhf/CodeMirror,ksanaforge/CodeMirror,crazy4chrissi/CodeMirror,mihailik/CodeMirror,antimatter15/CodeMirror,increpare/CodeMirror,ashmind/CodeMirror,melpon/CodeMirror,ashmind/CodeMirror,adobe/CodeMirror2,InternetGuru/CodeMirror,kuangyeheng/CodeMirror,AlanWasTaken/codemirror,DustinH/CodeMirror,symbla/CodeMirror,rrandom/CodeMirror,anthonygego/CodeMirror,matthewbauer/CodeMirror,Navaneethsen/CodeMirror,cben/CodeMirror,GerHobbelt/CodeMirror2,Icenium/CodeMirror,ssxxue/CodeMirror,shiren/CodeMirror,mizchi/CodeMirror,melpon/CodeMirror,pjkui/CodeMirror,djadmin/CodeMirror,belph/CodeMirror,alur/CodeMirror,MarcelGerber/CodeMirror,Navaneethsen/CodeMirror,sekcheong/CodeMirror,rustemferreira/CodeMirror,qiankun007/CodeMirror,abdelouahabb/CodeMirror,skylarkcob/CodeMirror,sekcheong/CodeMirror,bfrohs/CodeMirror,jessegrosjean/CodeMirror,mizchi/CodeMirror,happibum/CodeMirror-main,angelozerr/CodeMirror,djadmin/CodeMirror,DustinH/CodeMirror,mtaran-google/CodeMirror,apatawari/CodeMirror,agendor/CodeMirror,supriyantomaftuh/CodeMirror,agendor/CodeMirror,ejgallego/CodeMirror,trumanliu/CodeMirror,elisee/CodeMirror,Dominator008/CodeMirror,kolya-ay/CodeMirror,KamranMackey/CodeMirror,vincentwoo/CodeMirror,mtaran-google/CodeMirror,skylarkcob/CodeMirror,dbarnett/CodeMirror,kuangyeheng/CodeMirror,axter/CodeMirror,kk9599/CodeMirror,sanyaade-iot/CodeMirror,ZombieHippie/CodeMirror,jkaplon/CodeMirror,kangkot/CodeMirror,NeZaMy/CodeMirror2,joshterrell805-historic/CodeMirror,michaelerobertsjr/CodeMirror,pabloferz/CodeMirror,bfrohs/CodeMirror,wingify/CodeMirror,dperetti/CodeMirror,morrisonwudi/CodeMirror,cintiamh/CodeMirror,manderson23/CodeMirror,fivetran/CodeMirror,mihailik/CodeMirror,jpolitz/CodeMirror,ficristo/CodeMirror,schanzer/CodeMirror,apatawari/CodeMirror,nawroth/CodeMirror,ThebingServices/CodeMirror,cintiamh/CodeMirror,ssxxue/CodeMirror,mizchi/CodeMirror,qiankun007/CodeMirror,r7kamura/CodeMirror,tpphu/CodeMirror,systay/CodeMirror,thomasjm/CodeMirror,Jisuanke/CodeMirror,xeronith/CodeMirror,amshali/CodeMirror,Dominator008/CodeMirror,matthewbauer/CodeMirror,KamranMackey/CodeMirror,mightyguava/CodeMirror,kevinushey/CodeMirror,jansel/CodeMirror,fmoliveira/CodeMirror,Aliccer/CodeMirror,namin/CodeMirror,rasata/CodeMirror,michaelerobertsjr/CodeMirror,agendor/CodeMirror,TDaglis/CodeMirror,Jisuanke/CodeMirror,alur/CodeMirror,d0liver/CodeMirror,INTELOGIE/CodeMirror,wingify/CodeMirror,buchslava/CodeMirror,manderson23/CodeMirror,NeZaMy/CodeMirror2,dperetti/CodeMirror,davidpham87/CodeMirror,kangkot/CodeMirror,jhnesk/CodeMirror,shiren/CodeMirror,bluesh55/CodeMirror,bgrins/CodeMirror,loopspace/CodeMirror,tpphu/CodeMirror,pjkui/CodeMirror,Aliccer/CodeMirror,jochenberger/CodeMirror,InternetGuru/CodeMirror,Navaneethsen/CodeMirror,bgrins/CodeMirror,qweasd1/CodeMirror,pinbe/CodeMirror,jkaplon/CodeMirror,mightyguava/CodeMirror,Aliccer/CodeMirror,grzegorzmazur/CodeMirror,axter/CodeMirror,sgoo/CodeMirror,thomasjm/CodeMirror,jayaprabhakar/CodeMirror,karevn/CodeMirror,pabloferz/CodeMirror,antimatter15/CodeMirror,qweasd1/CodeMirror,karthikeyansam/CodeMirror,kangkot/CodeMirror,crazy4chrissi/CodeMirror,jansel/CodeMirror,mightyguava/CodeMirror,EasonYi/CodeMirror,bgrins/CodeMirror,notepadqq/CodeMirror,CartoDB/CodeMirror,rustemferreira/CodeMirror,amsul/CodeMirror,NumbersInternational/CodeMirror,webida/CodeMirror,AlanWasTaken/codemirror,gkoberger/CodeMirror,sanyaade-iot/CodeMirror,nightwing/CodeMirror,wbinnssmith/CodeMirror,mtaran-google/CodeMirror,elisee/CodeMirror,tpphu/CodeMirror,increpare/CodeMirror,hackmdio/CodeMirror,joshterrell805-historic/CodeMirror,TDaglis/CodeMirror,jpolitz/CodeMirror,rustemferreira/CodeMirror,bocharsky-bw/CodeMirror,codio/CodeMirror,dudb/CodeMirror,wbinnssmith/CodeMirror