Description of problem:
When I delete a repository in Administration perspective and return to Project Authoring which I left having some assets from the deleted repository open, the perspective state is restored and open editors display the message "No such file. Please check the file exists at the version selected.". This is correct behaviour.

I am able to close most of the editors but .rdrl and .rdslr editors do not react to clicking the close button.

Moreover, at this point it is impossible to switch to a different perspective. Medkit button does not help. When I log out and back in, guided editors are open again and, again, it is impossible to switch perspectives.

Version-Release number of selected component (if applicable):
6.1.0.ER5

How reproducible:
-

Steps to Reproduce:
1. Go to mortgages or another project with .rdrl rules.
2. Open all kinds of files.
3. Go to Administration and remove repository containing the project with open editors.
4. Go back to Project Authoring.
5. Try closing all editors.

Actual results:
- .rdrl and .rdslr editors cannot be closed
- perspectives cannot be switched
- medkit doesn't help

Expected results:
It should be possible to clean up perspective state either by closing editors individually or using the medkit button.

Additional info: