[projmgr] List layers: fix removal of subset configurations

[grasci-arm]

Address #1636

[github-actions]

Test Results

    3 files     18 suites   7m 37s ⏱️
  359 tests   359 ✅ 0 💤 0 ❌
1 077 runs  1 077 ✅ 0 💤 0 ❌

Results for commit c10fcf5.

♻️ This comment has been updated with latest results.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.80%. Comparing base (bcbc211) to head (c10fcf5).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1640   +/-   ##
=======================================
  Coverage   63.80%   63.80%           
=======================================
  Files         162      162           
  Lines       31625    31627    +2     
  Branches    19387    19385    -2     
=======================================
+ Hits        20179    20181    +2     
- Misses       7567     7573    +6     
+ Partials     3879     3873    -6     

Flag	Coverage Δ
projmgr-cov	80.64% <100.00%> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
tools/projmgr/src/ProjMgrWorker.cpp	87.05% <100.00%> (+<0.01%)	⬆️
tools/projmgr/test/src/ProjMgrWorkerUnitTests.cpp	65.85% <100.00%> (+0.02%)	⬆️

... and 1 file with indirect coverage changes