Collaboration: Added experimental feature link.
Collaboration: Hide session link.
AppController: Code styling.
Routes: Defer routing to default ws.
Collaboration: Moved `kickParticipant` to AppController.
Collaboration: Added getCollaboration method.
ChatView: Passed `isInSession` data to chat pane.
ChatPane: Disable click handler for switching settings pane.
MessagePane: Show end or leave session menu item in context menu.
IDE: Styling for context menu item.
Collaboration: Suspiciously added existence check.
AvatarView: Handle watch/unwatch and kick in avatar context menu.
Merge branch 'collaboration' of github.com:koding/IDE into collaboration
IDE: minor fat arrow fix
Collaboration: chathead filemenu logic improvement