Don't initialize Tree History unless tree-slider is present
Don't initialize Tree History unless tree-slider is present

This was breaking breadcrumb links on non-Tree pages
eliasp/gitlabhq,NuLL3rr0r/gitlabhq,SkyWei/gitlabhq,rumpelsepp/gitlabhq,jaepyoung/gitlabhq,123Haynes/gitlabhq,hacsoc/gitlabhq,htve/GitlabForChinese,Burick/gitlabhq,openwide-java/gitlabhq,salipro4ever/gitlabhq,vjustov/gitlabhq,yulchitaj/TEST3,CodeCantor/gitlabhq,jrjang/gitlab-ce,ayufan/gitlabhq,fantasywind/gitlabhq,Datacom/gitlabhq,stoplightio/gitlabhq,gopeter/gitlabhq,chenrui2014/gitlabhq,luzhongyang/gitlabhq,fgbreel/gitlabhq,cinderblock/gitlabhq,NKMR6194/gitlabhq,mente/gitlabhq,it33/gitlabhq,zBMNForks/gitlabhq,pjknkda/gitlabhq,folpindo/gitlabhq,sue445/gitlabhq,H3Chief/gitlabhq,adaiguoguo/gitlab_globalserarch,Kambda/mobbr-gitlabhq,gopeter/gitlabhq,copystudy/gitlabhq,LytayTOUCH/gitlabhq,bigsurge/gitlabhq,nmav/gitlabhq,vjustov/gitlabhq,tk23/gitlabhq,icedwater/gitlabhq,luzhongyang/gitlabhq,ibiart/gitlabhq,8thcolor/eurucamp2014-htdsadr,it33/gitlabhq,jvanbaarsen/gitlabhq,cinderblock/gitlabhq,ikappas/gitlabhq,fscherwi/gitlabhq,inetfuture/gitlab-tweak,per-garden/gitlabhq,xuvw/gitlabhq,mr-dxdy/gitlabhq,ordiychen/gitlabhq,fscherwi/gitlabhq,youprofit/gitlabhq,revaret/gitlabhq,ibiart/gitlabhq,gorgee/gitlabhq,openwide-java/gitlabhq,pkgr/gitlabhq,kotaro-dev/gitlab-6-9,NARKOZ/gitlabhq,larryli/gitlabhq,chrrrles/nodeflab,sekcheong/gitlabhq,jirutka/gitlabhq,mathstuf/gitlabhq,shinexiao/gitlabhq,dwrensha/gitlabhq,Datacom/gitlabhq,bbodenmiller/gitlabhq,cncodog/gitlab,zBMNForks/gitlabhq,sonalkr132/gitlabhq,lvfeng1130/gitlabhq,rebecamendez/gitlabhq,louahola/gitlabhq,Kambda/Mobbr,SVArago/gitlabhq,jrjang/gitlab-ce,shinexiao/gitlabhq,ferdinandrosario/gitlabhq,lbt/gitlabhq,ayufan/gitlabhq,0x20h/gitlabhq,bozaro/gitlabhq,Devin001/gitlabhq,Burick/gitlabhq,yonglehou/gitlabhq,icedwater/gitlabhq,yatish27/gitlabhq,ArthurHoaro/Public-GitLab,xuvw/gitlabhq,Razer6/gitlabhq,sakishum/gitlabhq,martijnvermaat/gitlabhq,ibiart/gitlabhq,MauriceMohlek/gitlabhq,cinderblock/gitlabhq,dvrylc/gitlabhq,1ed/gitlabhq,koreamic/gitlabhq,dreampet/gitlab,szechyjs/gitlabhq,sakishum/gitlabhq,mrb/gitlabhq,eliasp/gitlabhq,rfeese/gitlab-ce,duduribeiro/gitlabhq,chadyred/gitlabhq,SVArago/gitlabhq,dyon/gitlab,joalmeid/gitlabhq,atomaka/gitlabhq,123Haynes/gitlabhq,k4zzk/gitlabhq,Razer6/gitlabhq,rumpelsepp/gitlabhq,jirutka/gitlabhq,cinderblock/gitlabhq,NKMR6194/gitlabhq,liyakun/gitlabhq,yatish27/gitlabhq,youprofit/gitlabhq,hacsoc/gitlabhq,TheWatcher/gitlabhq,yama07/gitlabhq,fendoudeqingchunhh/gitlabhq,pulkit21/gitlabhq,achako/gitlabhq,tk23/gitlabhq,ttasanen/gitlabhq,lvfeng1130/gitlabhq,zrbsprite/gitlabhq,chrrrles/nodeflab,tempbottle/gitlabhq,yuyue2013/ss,bbodenmiller/gitlabhq,hzy001/gitlabhq,darkrasid/gitlabhq,stellamiranda/mobbr-gitlabhq,dreampet/gitlab,inetfuture/gitlab-tweak,daiyu/gitlab-zh,martijnvermaat/gitlabhq,williamherry/gitlabhq,aaronsnyder/gitlabhq,kitech/gitlabhq,SkyWei/gitlabhq,jrjang/gitlabhq,ttasanen/gitlabhq,Soullivaneuh/gitlabhq,adaiguoguo/gitlab_globalserarch,bladealslayer/gitlabhq,delkyd/gitlabhq,SVArago/gitlabhq,youprofit/gitlabhq,MauriceMohlek/gitlabhq,bladealslayer/gitlabhq,ferdinandrosario/gitlabhq,Datacom/gitlabhq,dplarson/gitlabhq,michaKFromParis/sparkslab,ArthurHoaro/Public-GitLab,MauriceMohlek/gitlabhq,nguyen-tien-mulodo/gitlabhq,betabot7/gitlabhq,sekcheong/gitlabhq,theonlydoo/gitlabhq,rhels/gitlabhq,yama07/gitlabhq,NARKOZ/gitlabhq,pjknkda/gitlabhq,lbt/gitlabhq,michaKFromParis/sparkslab,fgbreel/gitlabhq,DanielZhangQingLong/gitlabhq,fgbreel/gitlabhq,sonalkr132/gitlabhq,yfaizal/gitlabhq,darkrasid/gitlabhq,OtkurBiz/gitlabhq,allysonbarros/gitlabhq,sekcheong/gitlabhq,manfer/gitlabhq,hzy001/gitlabhq,Keystion/gitlabhq,1ed/gitlabhq,ZeoAlliance/gitlabhq,H3Chief/gitlabhq,t-zuehlsdorff/gitlabhq,martinma4/gitlabhq,bozaro/gitlabhq,adaiguoguo/gitlab_globalserarch,riyad/gitlabhq,bladealslayer/gitlabhq,whluwit/gitlabhq,OlegGirko/gitlab-ce,since2014/gitlabhq,dvrylc/gitlabhq,allistera/gitlabhq,TheWatcher/gitlabhq,123Haynes/gitlabhq,ikappas/gitlabhq,tim-hoff/gitlabhq,xuvw/gitlabhq,duduribeiro/gitlabhq,johnmyqin/gitlabhq,martinma4/gitlabhq,ArthurHoaro/Public-GitLab,allistera/gitlabhq,rfeese/gitlab-ce,bozaro/gitlabhq,OlegGirko/gitlab-ce,LytayTOUCH/gitlabhq,OtkurBiz/gitlabhq,mathstuf/gitlabhq,kemenaran/gitlabhq,NuLL3rr0r/gitlabhq,CodeCantor/gitlabhq,betabot7/gitlabhq,Exeia/gitlabhq,jaepyoung/gitlabhq,mmkassem/gitlabhq,sideci-sample/sideci-sample-gitlabhq,screenpages/gitlabhq,yulchitaj/TEST3,aaronsnyder/gitlabhq,zBMNForks/gitlabhq,pulkit21/gitlabhq,jrjang/gitlabhq,tim-hoff/gitlabhq,jvanbaarsen/gitlabhq,chenrui2014/gitlabhq,WSDC-NITWarangal/gitlabhq,fendoudeqingchunhh/gitlabhq,koreamic/gitlabhq,1ed/gitlabhq,NARKOZ/gitlabhq,Soullivaneuh/gitlabhq,childbamboo/gitlabhq,ZeoAlliance/gitlabhq,WSDC-NITWarangal/gitlabhq,williamherry/gitlabhq,darkrasid/gitlabhq,bbodenmiller/gitlabhq,it33/gitlabhq,axilleas/gitlabhq,yama07/gitlabhq,iiet/iiet-git,jrjang/gitlab-ce,wangcan2014/gitlabhq,pjknkda/gitlabhq,stanhu/gitlabhq,fgbreel/gitlabhq,ttasanen/gitlabhq,wangcan2014/gitlabhq,sue445/gitlabhq,Keystion/gitlabhq,salipro4ever/gitlabhq,LytayTOUCH/gitlabhq,pupaxxo/gitlabhq,yfaizal/gitlabhq,dplar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