[FIX] installer: Propagate multi and lang values in convert charset form

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51509 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] Replacing plugins during profile export would occasionally cause nesting errors

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51513 b456876b-0849-0410-b77d-98878d47e9d5