feat: show loading icon when deleting or renaming groups

[st3iny]

Follow-up to #3957 (comment)

Note: The recordings are done with a throttled connection to emphasize the impact.

Bildschirmaufnahme_20240708_103524.mp4

Bildschirmaufnahme_20240708_103431.mp4

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 65.90%. Comparing base (d8b9150) to head (0f43086).
Report is 5 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #4013   +/-   ##
=========================================
  Coverage     65.90%   65.90%           
  Complexity      261      261           
=========================================
  Files            24       24           
  Lines           786      786           
=========================================
  Hits            518      518           
  Misses          268      268           

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[GVodyanov]

Cool