fix: removed new sidebar view stickiness

[awais-ansari]

INF-1338

• Discussions and notification sidebar stickiness cause UI issues in mobile and web views.
• Removed stickiness from the sidebar

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.36%. Comparing base (cf3a91d) to head (a5580d6).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1376      +/-   ##
==========================================
+ Coverage   88.30%   88.36%   +0.06%     
==========================================
  Files         292      292              
  Lines        5002     5012      +10     
  Branches     1267     1272       +5     
==========================================
+ Hits         4417     4429      +12     
+ Misses        569      567       -2     
  Partials       16       16              

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