fix: Allow member join/leave events to also show unread count badge [WPB-5148]

[atomrc]

WPB-5148 [web] unread count disapears when a member message arrives in a conversation

Description

Screenshots/Screencast (for UI changes)

Before

no-unread.mp4

After

Screen.Recording.2023-10-23.at.10.55.41.mov

Checklist

• PR has been self reviewed by the author;
• Hard-to-understand areas of the code have been commented;
• If it is a core feature, unit tests have been added;

[codecov]

Codecov Report

Merging #16085 (c4b4e31) into dev (154c054) will increase coverage by 0.00%.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##              dev   #16085   +/-   ##
=======================================
  Coverage   44.81%   44.82%           
=======================================
  Files         706      706           
  Lines       23331    23328    -3     
  Branches     5301     5299    -2     
=======================================
  Hits        10456    10456           
+ Misses      11518    11515    -3     
  Partials     1357     1357