Collaboration: Set active panes for participants after change come.
Collaboration: Handle pane removed for participants.
EditorPane: Removed FileSave change event.

It was misleading because every file content sync doesn't mean file is saved.
RealTimeManager: Added getCollaborators method.
Collaboration: Inline getParticipants method.
Collaboration: Register user session id to participants list.
Collaboration: User presence v.0.1.
IDE: alignment
IDE: IDE sidebar custom scrolls implemented