fix(ConversationSidebar): fix visual glitch when expanding the sidebar [WPB-10549]

[dariaoldenburg]

WPB-10549 [web] Visual glitch when expanding the sidebar

Description

Screenshots/Screencast (for UI changes)

Checklist

• mentions the JIRA issue in the PR name (Ex. [WPB-XXXX])
• 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;

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.97%. Comparing base (f3ebc5e) to head (765f869).

Additional details and impacted files

@@           Coverage Diff           @@
##              dev   #18683   +/-   ##
=======================================
  Coverage   45.96%   45.97%           
=======================================
  Files         894      894           
  Lines       27396    27396           
  Branches     6185     6185           
=======================================
+ Hits        12593    12594    +1     
  Misses      13238    13238           
+ Partials     1565     1564    -1