undocking and redocking scene view breaks rendered scene

[Doprez]

Release Type: GitHub

Version: master and 4.2.0.2043

Platform(s): Windows

Describe the bug Currently in Master when you undock and the redock the scene view it causes the scene render to go blank. You have to reload the scene to get the view back to normal.

To Reproduce Steps to reproduce the behavior:

1. drag the scene tab into its own window.
2. place the scene back into the dock

Expected behavior Sceneview should not be blank after redocking to GameStudio.

Screenshots

Additional context This works fine in the release 4.1.0.1948