Fix badge counter

[gnunicorn]

We have had reports that the app Badge counter wasn't properly updating (especially on iOS and Mac). Looks like we are updating it but based on the still "active" notifications count, which might not be what the user expects. And as they can't really clear that listing (as it is with the system) for now, the number annoys quite some people. To resolve that, I've added a temporary fix removing the badge counter entirely (setting it to 0 regardless of current known number of notifications) until we have the activity center in a way that can allow for them to be cleared.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 27.08%. Comparing base (4d77a69) to head (a2c04b2).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2349      +/-   ##
==========================================
+ Coverage   27.05%   27.08%   +0.02%     
==========================================
  Files         596      596              
  Lines       41433    41433              
==========================================
+ Hits        11211    11222      +11     
+ Misses      30222    30211      -11     

Flag	Coverage Δ
integration-test	37.08% <ø> (+0.06%)	⬆️
unittest	18.72% <ø> (ø)

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