fix: fixed width issues of old and new sidebar

[sundasnoreen12]

INF-1373

Description
Fixed following issues:

1. The width of the new in-context sidebar remained fixed, causing UI disturbances when the number of units increased due to the sidebar's 'stick to the top' property.
2. The width of the sidebar exhibited inconsistencies across different screen sizes as the number of units increased.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.32%. Comparing base (cf3a91d) to head (182e7cb).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1374      +/-   ##
==========================================
+ Coverage   88.30%   88.32%   +0.02%     
==========================================
  Files         292      292              
  Lines        5002     5012      +10     
  Branches     1267     1272       +5     
==========================================
+ Hits         4417     4427      +10     
  Misses        569      569              
  Partials       16       16              

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