[FIX] ui: Reset overlay z-index so modal dialogs appear on top when draw is enabled (after r48812)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49064 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] login: Check email validation

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49065 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] trackers: Better js targeting of the related_items list and filter out empty elements on save

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49067 b456876b-0849-0410-b77d-98878d47e9d5