fix(editor): disable at menu member group for collaborator

[Flrande]

Close BS-2893
Close BS-2891

[graphite-app]

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[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Project coverage is 54.28%. Comparing base (a189421) to head (3303684).
Report is 1 commits behind head on canary.

Files with missing lines	Patch %	Lines
...-root/src/widgets/linked-doc/linked-doc-popover.ts	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           canary   #11208      +/-   ##
==========================================
- Coverage   54.28%   54.28%   -0.01%     
==========================================
  Files        2560     2560              
  Lines      115684   115685       +1     
  Branches    18827    18826       -1     
==========================================
- Hits        62797    62796       -1     
+ Misses      51550    50919     -631     
- Partials     1337     1970     +633     

Flag	Coverage Δ
server-test	78.82% <ø> (-0.01%)	⬇️
unittest	30.28% <0.00%> (-0.01%)	⬇️

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[EYHN]

Merge activity

• Mar 27, 5:35 AM EDT: The merge label 'merge' was detected. This PR will be added to the Graphite merge queue once it meets the requirements.
• Mar 27, 5:35 AM EDT: EYHN added this pull request to the Graphite merge queue.
• Mar 27, 6:00 AM EDT: A user merged this pull request with the Graphite merge queue.