chat: improve menu creation and hide weird element
chat: destroy chat view when collaboration ended
chat: add extra checks for new user on settings pane
ide: comment out a problematic case for collab ide
Merge pull request #109 from usirin/collaboration

Collaboration
IDE: minor fat arrow fix
Collaboration: chathead filemenu logic improvement
Filetree: loader div updated
Collaboration: Watch menu item initial commit
Collaboration: chat panel close icon tooltip added
Collaboration: chat heads online - offline styles and host logic
Collaboration: sessionHost replaced with amIHost to be consistent
IDE: forgotten include added
Collaboration: watch state styles
Collaboration: chat heads file menu positioning fix
Collaboration: watching logic improvements
Collaboration: chat head menu don't show watch for offline people
Collaboration: watch toggle and info link styling
Collaboration: create myWatchMap on initiation
IDE: dont show watch indicator for offline users