Stop the active transport before making an /abort request (JS Client)

- Desktop and mobile Safari will sometimes crash if a synchronous request
  is made during unload with an ongoing WebSocket connection open
- Stopping the ongoing WebSocket connection before making the /abort
  request during unload prevents Safari from crashing

#2650
Removed unused resource strings from SQL message bus project
- #2699
Removed unused Service Bus resource strings

#2698
Merge branch 'release' into dev