* Added support for showing realtime app editors
* emitting an event only when socket is connected
* added a tooltip to show username/email
* using proper selector
* using theme
* created the separate component for listing editors
* created a separate hook for app collab events
* moved collab user type to /entities
* moved user visible strings to message constants
* Revert "moved user visible strings to message constants"
This reverts commit 04ac18a188b0117dd364ad764a4e0103bfd28ef6.
* made provision to reset the concurrent editors list
