Properly binds "this" in uploader.js
Properly binds "this" in uploader.js

closes #6146

anijap/PhotoGhost,PeterCxy/Ghost,kaychaks/kaushikc.org,BlueHatbRit/Ghost,leonli/ghost,telco2011/Ghost,Gargol/Ghost,SkynetInc/steam,STANAPO/Ghost,stridespace/Ghost,sebgie/Ghost,Smile42RU/Ghost,Smile42RU/Ghost,duyetdev/islab,JohnONolan/Ghost,ignasbernotas/nullifer,TryGhost/Ghost,hnarayanan/narayanan.co,kevinansfield/Ghost,TryGhost/Ghost,ghostchina/Ghost-zh,leonli/ghost,rizkyario/Ghost,sunh3/Ghost,cicorias/Ghost,klinker-apps/ghost,anijap/PhotoGhost,ngosinafrica/SiteForNGOs,syaiful6/Ghost,dggr/Ghost-sr,Trendy/Ghost,cwonrails/Ghost,RufusMbugua/TheoryOfACoder,SkynetInc/steam,disordinary/Ghost,barbastan/Ghost,bosung90/Ghost,daihuaye/Ghost,pollbox/ghostblog,e10/Ghost,Xibao-Lv/Ghost,sebgie/Ghost,JohnONolan/Ghost,ivantedja/ghost,telco2011/Ghost,adam-paterson/blog,rizkyario/Ghost,STANAPO/Ghost,janvt/Ghost,karmakaze/Ghost,BlueHatbRit/Ghost,Elektro1776/javaPress,Kaenn/Ghost,jomahoney/Ghost,sebgie/Ghost,Kikobeats/Ghost,Kaenn/Ghost,Yarov/yarov,javorszky/Ghost,pollbox/ghostblog,karmakaze/Ghost,singular78/Ghost,ManRueda/manrueda-blog,RufusMbugua/TheoryOfACoder,sunh3/Ghost,chris-yoon90/Ghost,ignasbernotas/nullifer,JonSmith/Ghost,acburdine/Ghost,ghostchina/Ghost-zh,letsjustfixit/Ghost,zumobi/Ghost,klinker-apps/ghost,JohnONolan/Ghost,leninhasda/Ghost,epicmiller/pages,GroupxDev/javaPress,Yarov/yarov,acburdine/Ghost,singular78/Ghost,Trendy/Ghost,jaswilli/Ghost,JulienBrks/Ghost,dggr/Ghost-sr,dbalders/Ghost,janvt/Ghost,zumobi/Ghost,bitjson/Ghost,veyo-care/Ghost,lf2941270/Ghost,leninhasda/Ghost,veyo-care/Ghost,letsjustfixit/Ghost,AlexKVal/Ghost,MadeOnMars/Ghost,dqj/Ghost,duyetdev/islab,delgermurun/Ghost,vainglori0us/urban-fortnight,cwonrails/Ghost,etanxing/Ghost,ManRueda/manrueda-blog,telco2011/Ghost,ashishapy/ghostpy,benstoltz/Ghost,obsoleted/Ghost,barbastan/Ghost,chris-yoon90/Ghost,disordinary/Ghost,e10/Ghost,daimaqiao/Ghost-Bridge,bitjson/Ghost,novaugust/Ghost,jaswilli/Ghost,Kikobeats/Ghost,TryGhost/Ghost,javorszky/Ghost,leonli/ghost,daimaqiao/Ghost-Bridge,tidyui/Ghost,GroupxDev/javaPress,bosung90/Ghost,syaiful6/Ghost,mohanambati/Ghost,kaychaks/kaushikc.org,adam-paterson/blog,jorgegilmoreira/ghost,ErisDS/Ghost,ballPointPenguin/Ghost,sangcu/Ghost,obsoleted/Ghost,novaugust/Ghost,AlexKVal/Ghost,GroupxDev/javaPress,mayconxhh/Ghost,lukekhamilton/Ghost,jomahoney/Ghost,weareleka/blog,olsio/Ghost,dbalders/Ghost,patterncoder/patterncoder,MadeOnMars/Ghost,dbalders/Ghost,benstoltz/Ghost,augbog/Ghost,dqj/Ghost,mohanambati/Ghost,kevinansfield/Ghost,ashishapy/ghostpy,epicmiller/pages,letsjustfixit/Ghost,jamesslock/Ghost,Kikobeats/Ghost,handcode7/Ghost,Elektro1776/javaPress,sangcu/Ghost,handcode7/Ghost,Xibao-Lv/Ghost,stridespace/Ghost,ManRueda/manrueda-blog,stridespace/Ghost,vainglori0us/urban-fortnight,chevex/undoctrinate,mohanambati/Ghost,daihuaye/Ghost,petersucks/blog,cicorias/Ghost,hnarayanan/narayanan.co,dggr/Ghost-sr,ngosinafrica/SiteForNGOs,lf2941270/Ghost,JulienBrks/Ghost,ballPointPenguin/Ghost,rizkyario/Ghost,mayconxhh/Ghost,acburdine/Ghost,jamesslock/Ghost,petersucks/blog,lukekhamilton/Ghost,NovaDevelopGroup/Academy,vainglori0us/urban-fortnight,Gargol/Ghost,Elektro1776/javaPress,ckousik/Ghost,kevinansfield/Ghost,ErisDS/Ghost,weareleka/blog,tidyui/Ghost,patterncoder/patterncoder,jorgegilmoreira/ghost,novaugust/Ghost,ckousik/Ghost,cwonrails/Ghost,ErisDS/Ghost,etanxing/Ghost,augbog/Ghost,Kaenn/Ghost,daimaqiao/Ghost-Bridge,olsio/Ghost,delgermurun/Ghost,singular78/Ghost,jorgegilmoreira/ghost,NovaDevelopGroup/Academy,NovaDevelopGroup/Academy,PeterCxy/Ghost,JonSmith/Ghost