Notification fixes

[stefanceriu]

• Fixes Wrong unread count on desktop icon (macOS) #1573 - Retract all notifications and app badges when signing out
• Update the app badge after receiving a notification by reading and using the unreadCount from the request payload

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[github-actions]

	Warnings
⚠️	Please add a changelog.
⚠️	Some of the commits are missing ticket numbers. Please consider squashing all commits that don't have a tracking number.

Generated by 🚫 Danger Swift against 23af12a

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: -0.11% ⚠️

Comparison is base (d8fa82d) 58.34% compared to head (23af12a) 58.23%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1633      +/-   ##
===========================================
- Coverage    58.34%   58.23%   -0.11%     
===========================================
  Files          410      410              
  Lines        27696    27701       +5     
  Branches     13748    13748              
===========================================
- Hits         16159    16132      -27     
- Misses       11092    11126      +34     
+ Partials       445      443       -2     

Flag	Coverage Δ
unittests	22.78% <0.00%> (-0.07%)	⬇️

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

Files Changed	Coverage Δ
ElementX/Sources/Application/AppCoordinator.swift	57.34% <0.00%> (-0.47%)	⬇️

... and 4 files with indirect coverage changes

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[Velin92]

LGTM