[MM-326] Fix issue of gitlab sidebar icons visible when user is not connected

[ayusht2810]

Summary

• Hide/unhide the LHS icons on the basis of user connection with GitLab

screen-capture.webm

Ticket Link

#467

Checklist

• [x] Completed dev testing
• [x] make test Ran test cases and ensured they are passing
• [x] make check-style Ran style check and ensured both webapp and server pass the checks

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 34.02%. Comparing base (53b10f3) to head (77c1db6). Report is 15 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #468   +/-   ##
=======================================
  Coverage   34.02%   34.02%           
=======================================
  Files          22       22           
  Lines        4021     4021           
=======================================
  Hits         1368     1368           
  Misses       2515     2515           
  Partials      138      138           

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[ayusht2810]

@mickmister Should we move the PR to the QA review?