refactor(dropdown): remove isolated scope
refactor(dropdown): remove isolated scope

Closes #1818

caoruiy/bootstrap,davious/angular-ui-bootstrap,elancom/bootstrap-1,RyanChenLee/bootstrap,elijah513/bootstrap,Lohann/bootstrap,sandeepkaturi/report-manage-of-bootstrap,KingMario/bootstrap-1,fernando-sendMail/bootstrap,obivandamme/bootstrap,jaydiablo/bootstrap,pdsoftplan/bootstrap,stereocilia/bootstrap,benhalverson/bootstrap,deskfed/bootstrap,vlajos/bootstrap,rhamid/bootstrap-1,freejavaster/bootstrap,JonFerrera/ui-bootstrap,nlwillia/bootstrap,linuxvom/bootstrap,iamcbh/bootstrap,franzherzog/bootstrap,yubin-huang/bootstrap,Nekle/bootstrap,infowrap/bootstrap,themifycloud/bootstrap,yukisan/bootstrap,JonathanGawrych/bootstrap,SystemDisc/bootstrap,josheche/bootstrap-1,connyay/bootstrap,yangcwGIT/bootstrap,akinsony/bootstrap,292388900/bootstrap,filso/bootstrap,andrepitombeira/bootstrap,mufl1h/bootstrap,wonderflow-bv/bootstrap,jordangraft/bootstrap,andreialecu/bootstrap,kirning/bootstrap-1,looker/bootstrap,gbasto/bootstrap,christor/bootstrap,saintnikopol/bootstrap,Nekle/bootstrap,iamcbh/bootstrap,MetSystem/bootstrap,dabos-GFI/angular-ui-bootstrap,obivandamme/bootstrap,rhamid/bootstrap-1,qpitlove/bootstrap,eduncan26/bootstrap,SimilarWeb/bootstrap,dsisejkovic/bootstrap,SandeepSikhakolli/bootstrap,yubin-huang/bootstrap,ksheedlo/bootstrap,voyagecontrol/bootstrap,elancom/bootstrap-1,vfiles/bootstrap,Lincoln-xzc/angular-ui-bootstrap,shootermv/bootstrap,hxtpoe/bootstrap,edivancamargo/bootstrap,cdrewery/bootstrap,nealhan/bootstrap,guaerguagua/bootstrap,Servoy/bootstrap,thalen/bootstrap,fjg1989/bootstrap,Gailby/bootstrap,Farael49/bootstrap,bikegriffith/bootstrap,Den-dp/bootstrap,RopoMen/bootstrap,Xephi/bootstrap,deeg/bootstrap,teng2015/bootstrap,parikmaher534/bootstrap,maoli1110/bootstrap,rasulnz/bootstrap,burlhock/bootstrap,kmccaw/bootstrap,reiniergs/bootstrap,Bugagazavr/bootstrap,cgvarela/bootstrap-1,DenisCloutier/bootstrap,succ1984/bootstrap,Den-dp/bootstrap,netanelgilad/bootstrap-1,guaerguagua/bootstrap,thomassorensen/bootstrap,webflow/angular-bootstrap,EnuygunCom/enuygun-frontend-vendor-ui-bootstrap,ehteshamkafeel/bootstrap,burlhock/bootstrap,Kpler/bootstrap,antoinepairet/bootstrap,jczerwinski/bootstrap-1,yjukaku/bootstrap,bekos/bootstrap,spadgett/bootstrap,ahsanbagwan/bootstrap,BookingBug/bootstrap,irwinlove/bootstrap-1,realityking/ui-bootstrap,zen4s/UIBootstrap,themifycloud/bootstrap,voyagecontrol/bootstrap,azahreba/bootstrap,byronigoe/bootstrap,SandeepSikhakolli/bootstrap,Anirudhk94/bootstrap,shootermv/bootstrap,tobigun/bootstrap,Lincoln-xzc/angular-ui-bootstrap,davereed/bootstrap,hxtpoe/bootstrap,npatelseamless/ghs-typeahead,imskojs/bootstrap,azahreba/bootstrap,codedogfish/angular-ui-bootstrap,AlexFine/bootstrap,vsternbach/bootstrap,christor/bootstrap,Lexxville/bootstrap-1,AgDude/bootstrap,Schibum/bootstrap,mufl1h/bootstrap,Marwzoor/bootstrap,folsom-labs/bootstrap,pireerliu/bootstrap,nobitagit/bootstrap,Lexxville/bootstrap-1,dabos-GFI/angular-ui-bootstrap,gato-gordo/bootstrap,KingMario/bootstrap-1,noellejung/bootstrap,AlexFine/bootstrap,LogicState/bootstrap,synapscommerce/bootstrap,filipkis/bootstrap,madhudskumar/bootstrap,Xephi/bootstrap,dsisejkovic/bootstrap,freejavaster/bootstrap,inoxis91/bootstrap,universsky/bootstrap-1,liiza/bootstrap,wuwei111467/bootstrap,akinsony/bootstrap,drocbuster/My_AngularJS_Repo,parikmaher534/bootstrap,drocbuster/My_AngularJS_Repo,elijah513/bootstrap,pbrewer/bootstrap,codedogfish/angular-ui-bootstrap,DiHuang1986/bootstrap,ccslakey/bootstrap,RobJacobs/bootstrap,lancerushing/bootstrap,RobJacobs/bootstrap,nobitagit/bootstrap,woshiyigebing/bootstrap,RopoMen/bootstrap,Regencyop/bootstrap,succ1984/bootstrap,rodrigues-daniel/bootstrap,dkuerner/bootstrap,VoltiSubito/bootstrap,fpipita/bootstrap,sandeepkaturi/report-manage-of-bootstrap,pkdevbox/bootstrap-1,rajesh-frontendengineer/bootstrap-1,franzherzog/bootstrap,connyay/bootstrap,Real-Currents/ui-bootstrap,mabi/bootstrap,fmccown/bootstrap,mykhaylo-/bootstrap,ahsanbagwan/bootstrap,JDeuker/bootstrap,miiihi/bootstrap,JonFerrera/ui-bootstrap,kirning/bootstrap-1,Zazulei/bootstrap,carlosjunior/bootstrap,buchslava/bootstrap,liiza/bootstrap,Emobe/bootstrap,andreialecu/bootstrap,GirishKumrawat/bootstrap,matteopic/bootstrap,fabg21/bootstrap,realityking/ui-bootstrap,cgat/bootstrap,benhalverson/bootstrap,nathan-j-brenner/bootstrap-1,pmalikbtech/bootstrap,rkeshmir/persian-angular-ui-bootstrap,shihang0001/bootstrap,davincho/bootstrap,guaido79/bootstrap,yong1236/angular-ui-bootstrap,zepheiryan/bootstrap,woshiyigebing/bootstrap,sullivanpt/bootstrap,gazoakley/bootstrap,ChinnasamyM/bootstrap,sullivanpt/bootstrap,patrick91/bootstrap,icfantv/bootstrap,inukshuk/bootstrap,Marwzoor/bootstrap,benhalverson/bootstrap,ThePenguin1140/semantic-angular,rainlake/bootstrap,Farael49/bootstrap,BeyondD/bootstrap,teng2015/bootstrap,gato-gordo/bootstrap,Vreasy/bootstrap,eduncan26/bootstrap,miiihi/bootstrap,leornado/angular-ui-bootstrap-wnd,finkcloud/bootstrap,nicklv/bootstrap,Crunch-io/bootstrap,pmalikbtech/bootstrap,shadowdaw/bootstrap,kmccaw/bootstrap,oliversalzburg/bootstrap,jackRogers/bootstrap,WXwangxin/bootstrap,maoli1110/bootstrap,marklagendijk/bootstrap,dimitriwalters/bootstrap-1,jackRogers/bootstrap,gfaceless/bootstrap,tmcgee123/bootstrap,linuxb/bootstrap,wonderflow-bv/bootstrap,TORO-IO/bootstrap-1,Regencyop/bootstrap,SimilarWeb/bootstrap,SatvikPurohit/bootstrap,yukisan/bootstrap,byronigoe/bootstrap,suryasingh/bootstrap,chrisirhc/angular-ui-bootstrap,jczerwinski/bootstrap-1,daviesgeek/bootstrap,RyanChenLee/bootstrap,suryasingh/bootstrap,ehteshamkafeel/bootstrap,nlwillia/bootstrap,techkrish/bootstrap,yangcwGIT/bootstrap,krossoverintelligence/bootstrap,xiwc/bootstrap-1,cesarmarinhorj/AngularJS-bootstrap,liqingzhu/bootstrap,bqevin/bootstrap-1,davereed/bootstrap,Foxandxss/bootstrap,linuxvom/bootstrap,gfaceless/bootstrap,folsom-labs/bootstrap,mabi/bootstrap,JonathanGawrych/bootstrap,icfantv/bootstrap,zebMcCorkle/bootstrap,yjukaku/bootstrap,davious/angular-ui-bootstrap,liqingzhu/bootstrap,AgDude/bootstrap,bsiddiqui/bootstrap,zepheiryan/bootstrap,reinisp/bootstrap,cgat/bootstrap,wesleycho/bootstrap,BeyondD/bootstrap,kongx73/bootstrap,Zazulei/bootstrap,dmc2015/bootstrap,rodrigues-daniel/bootstrap,buchslava/bootstrap,looker/bootstrap,daviesgeek/bootstrap,spadgett/bootstrap,nathan-j-brenner/bootstrap-1,mykhaylo-/bootstrap,Servoy/bootstrap,martin-brennan-csnet/bootstrap,rasulnz/bootstrap,Emobe/bootstrap,opentable/angular-ui-bootstrap,karelcallens/bootstrap,filso/bootstrap,atulc007/bootstrap-1,ljantzen/bootstrap,stereocilia/bootstrap,bleggett/bootstrap,TORO-IO/bootstrap-1,saintnikopol/bootstrap,minzen/bootstrap,corystevens/bootstrap,Vreasy/bootstrap,impulso-animado/bootstrap,antoinepairet/bootstrap,stanzi83/bootstrap,DenisCloutier/bootstrap,alokpradhan/bootstrap,ChinnasamyM/bootstrap,saputro-dwy/bootstrap,2363140194/bootstrap,tradingscreen/bootstrap,rgolea/bootstrap,leornado/angular-ui-bootstrap-wnd,opentable/angular-ui-bootstrap,Gailby/bootstrap,vlajos/bootstrap,ksheedlo/bootstrap,dgoncalves1/bootstrap,inukshuk/bootstrap,kemapak/bootstrap,corystevens/bootstrap,madhudskumar/bootstrap,impulso-animado/bootstrap,bsiddiqui/bootstrap,justin-john/bootstrap-1,edivancamargo/bootstrap,dgoncalves1/bootstrap,blighli/bootstrap,yong1236/angular-ui-bootstrap,wesleycho/bootstrap,npatelseamless/ghs-typeahead,Kpler/bootstrap,linuxb/bootstrap,Lohann/bootstrap,qrohlf/bootstrap,leyanlo/bootstrap,JDeuker/bootstrap,tradingscreen/bootstrap,karelcallens/bootstrap,GirishKumrawat/bootstrap,reinisp/bootstrap,vsternbach/bootstrap,Schibum/bootstrap,Crunch-io/bootstrap,EnuygunCom/enuygun-frontend-vendor-ui-bootstrap,minzen/bootstrap,lancerushing/bootstrap,oliversalzburg/bootstrap,thomassorensen/bootstrap,tobigun/bootstrap,mohuk/bootstrap,netanelgilad/bootstrap-1,benhalverson/bootstrap,zen4s/UIBootstrap,pkdevbox/angular-ui-bootstrap,qpitlove/bootstrap,mikesavior/bootstrap,krossoverintelligence/bootstrap,xiwc/bootstrap-1,pireerliu/bootstrap,qrohlf/bootstrap,vfiles/bootstrap,Jchavez/bootstrap-1,fernando-sendMail/bootstrap,angular-ui/bootstrap,SystemDisc/bootstrap,cesarmarinhorj/AngularJS-bootstrap,wuhoujun/bootstrap,bleggett/bootstrap,cdrewery/bootstrap,marklagendijk/bootstrap,matteopic/bootstrap,deeg/bootstrap,Jchavez/bootstrap-1,shadowdaw/bootstrap,DiHuang1986/bootstrap,292388900/bootstrap,bikegriffith/bootstrap,birdy-/bootstrap,rainlake/bootstrap,atulc007/bootstrap-1,reiniergs/bootstrap,xzoth/bootstrap,jordangraft/bootstrap,chrisirhc/angular-ui-bootstrap,LogicState/bootstrap,cgvarela/bootstrap-1,carlosjunior/bootstrap,angular-ui/bootstrap,martin-brennan-csnet/bootstrap,tmcgee123/bootstrap,SatvikPurohit/bootstrap,bqevin/bootstrap-1,deskfed/bootstrap,eftakharali/bootstrap,finkcloud/bootstrap,rgolea/bootstrap,2363140194/bootstrap,shiftagent/ui-bootstrap,VoltiSubito/bootstrap,kaizenplatform/angular-ui-bootstrap,pkdevbox/angular-ui-bootstrap,alokpradhan/bootstrap,pdsoftplan/bootstrap,maxfierke/angular-ui-bootstrap,fmccown/bootstrap,ThePenguin1140/semantic-angular,wuwei111467/bootstrap,fabg21/bootstrap,irwinlove/bootstrap-1,yonglehou/bootstrap-1,eftakharali/bootstrap,Lalem001/angular-ui-bootstrap,kongx73/bootstrap,gorork/bootstrap,MetSystem/bootstrap,imskojs/bootstrap,pbrewer/bootstrap,pkdevbox/bootstrap-1,stanzi83/bootstrap,universsky/bootstrap-1,WXwangxin/bootstrap,gbasto/bootstrap,rkeshmir/persian-angular-ui-bootstrap,lazercore/angular-ui-bootstrap,MikhailNazarov/bootstrap,blighli/bootstrap,mikesavior/bootstrap,ljantzen/bootstrap,justin-john/bootstrap-1,caoruiy/bootstrap,softgrad-dev2/angular_demo,guaido79/bootstrap,nicklv/bootstrap,Foxandxss/bootstrap,rajesh-frontendengineer/bootstrap-1,Real-Currents/ui-bootstrap,BookingBug/bootstrap,saputro-dwy/bootstrap,mohuk/bootstrap,birdy-/bootstrap,Teleopti/bootstrap,yonglehou/bootstrap-1,jaydiablo/bootstrap,gorork/bootstrap,fpipita/bootstrap,Lalem001/angular-ui-bootstrap,Bugagazavr/bootstrap,josheche/bootstrap-1,zhaokunfay/bootstrap,hyoda/bootstrap,kemapak/bootstrap,fjg1989/bootstrap,ccslakey/bootstrap,leyanlo/bootstrap,wuhoujun/bootstrap,softgrad-dev2/angular_demo,shihang0001/b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