[GH-383] Fix UX for member_access_request in right hand sidebar

[raghavaggarwal2308]

Summary

• Fixed the UI for the "member_access_request" type todo/unread in RHS
• A PR [GH-400] Display proper message for access request todo #404 is already open to fix the UX gap for todos posted after running the /gitlab todo command.

Screenshots

What to test?

• ToDos of type "member_access_request" are rendered properly in the RHS.

Steps to reproduce:

1. Connect your Gitlab account.
2. Generate a notification of type "member_access_request" on the Gitlab side. (You can do so by making an access request to one of your project/group by some another user)
3. Open the RHS for todos/unreads.

Environment:

MM version: v7.8.2
Node version: 14.18.0
Go version: 1.19.0

Ticket Link

Fixes #383

[codecov]

Codecov Report

All modified lines are covered by tests ✅

Comparison is base (7190bfd) 32.91% compared to head (09ce146) 32.91%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #407   +/-   ##
=======================================
  Coverage   32.91%   32.91%           
=======================================
  Files          22       22           
  Lines        4017     4017           
=======================================
  Hits         1322     1322           
  Misses       2564     2564           
  Partials      131      131           

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[raghavaggarwal2308]

@mickmister Fixed the review comments mentioned by you

[AayushChaudhary0001]

Tested and approved. LGTM