[MOD] filegals: Leave extension on zip file titles so they're easier to manage and find

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/11.x@46288 b456876b-0849-0410-b77d-98878d47e9d5
[ENH] elfinder: (Experimental) Enable 'extract' command using existing filegal 'batch' feature (gallery doesn't update after unzip, fix to come)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/11.x@46289 b456876b-0849-0410-b77d-98878d47e9d5
[MRG] Automatic merge, branches/11.x 46285 to 46289

git-svn-id: file:///var/local/code.tiki.org/tikisvn/trunk@46290 b456876b-0849-0410-b77d-98878d47e9d5