[FileIO] Support themes in root directory of sandbox when exporting
[FileIO] Support themes in root directory of sandbox when exporting

DonnaWuDongxia/rib,suoko/rib,Galen-Titanium/rib,KevinChanH/rib,ndkeren/rib,jsphkhan/rib,eaglebk/rib,crazyart/rib,vevedh/rib,2braincells2go/rib,amithnair/rib,ndkeren/rib,suoko/rib,b-cuts/rib,Galen-Titanium/rib,jmptrader/rib,DonnaWuDongxia/rib,cubemoon/rib,modulexcite/rib,KevinChanH/rib,xuqingkuang/rib,byjg/rib,crazyart/rib,modulexcite/rib,jmptrader/rib,2braincells2go/rib,VIP000/rib,amithnair/rib,byjg/rib,2braincells2go/rib,jmptrader/rib,b-cuts/rib,taubmann/rib,taubmann/rib,jsphkhan/rib,amithnair/rib,suoko/rib,Galen-Titanium/rib,01org/rib,crazyart/rib,xuqingkuang/rib,modulexcite/rib,eaglebk/rib,VIP000/rib,b-cuts/rib,cubemoon/rib,01org/rib,vevedh/rib,01org/rib,KevinChanH/rib