In bug 1700212, we hid the identity panel when the permission doorhangers display. We should do something similar for the permissions manager panel

Backed out for failures on browser_devices_get_user_media_queue_request.js

backout: https://hg.mozilla.org/integration/autoland/rev/5e5c1c7e7db0d6e996ccbf56a9aa8e445bc099eb

push: https://treeherder.mozilla.org/jobs?repo=autoland&group_state=expanded&revision=9c2ba085b136a21aa09056c86064eb66336333a5&selectedTaskRun=LpWtpVkPQj2gPnMuD1P_cg.0

failure log: https://treeherder.mozilla.org/logviewer?job_id=342759167&repo=autoland&lineNumber=3328

[task 2021-06-14T23:12:15.150Z] 23:12:15 INFO - TEST-PASS | browser/base/content/test/webrtc/browser_devices_get_user_media_queue_request.js | should not show screen state label in the permission panel -
[task 2021-06-14T23:12:15.150Z] 23:12:15 INFO - Buffered messages finished
[task 2021-06-14T23:12:15.150Z] 23:12:15 ERROR - TEST-UNEXPECTED-TIMEOUT | browser/base/content/test/webrtc/browser_devices_get_user_media_queue_request.js | application timed out after 370 seconds with no output
[task 2021-06-14T23:12:15.150Z] 23:12:15 ERROR - Force-terminating active process(es).
[task 2021-06-14T23:12:15.150Z] 23:12:15 INFO - Determining child pids from psutil...

Also failing: https://treeherder.mozilla.org/logviewer?job_id=342760569&repo=autoland&lineNumber=3849

There's a r+ patch which didn't land and no activity in this bug for 2 weeks.
:mhowell, could you have a look please?
For more information, please visit auto_nag documentation.

The patch didn't land because it was backed out from autoland for test failures. I'm string working on fixing it.