[FIX] chosen: Restore vital bit of code that actually makes chosen work, lost in my fix in r51830 (apologies, thanks LPH)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51879 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] css: Use margin instead of padding for switch lang flags (and move the definition into tiki-modules.less where the other box-switch_lang definitions are)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51880 b456876b-0849-0410-b77d-98878d47e9d5