Fixes context menu mute item not being displayed

[NejcZdovc]

Submitter Checklist:

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).
• Tagged reviewers and labelled the pull request as needed.
• Request a security/privacy review as needed. (Ask a Brave employee to help if you cannot access this document.)

Resolves #12472

Auditors:

Test Plan: defined in #12472

Reviewer Checklist:

• Request a security/privacy review as needed if one was not already requested.

Tests

• Adequate test coverage exists to prevent regressions
• Tests should be independent and work correctly when run individually or as a suite ref
• New files have MPL2 license header

[NejcZdovc]

@bsclifton it's basically the same fix that you did for mute/unmute

[codecov-io]

Codecov Report

Merging #12475 into master will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #12475      +/-   ##
==========================================
- Coverage   55.85%   55.82%   -0.04%     
==========================================
  Files         278      278              
  Lines       26996    26996              
  Branches     4364     4364              
==========================================
- Hits        15079    15070       -9     
- Misses      11917    11926       +9

Flag	Coverage Δ
#unittest	55.82% <ø> (-0.04%)	⬇️

Impacted Files	Coverage Δ
js/stores/appStoreRenderer.js	91.17% <0%> (-8.83%)	⬇️
app/renderer/components/reduxComponent.js	84.37% <0%> (-6.25%)	⬇️
js/stores/windowStore.js	27.25% <0%> (-0.31%)	⬇️

[bsclifton]

++

[bsclifton]

master 58b1b8f
0.21.x 63b4659
0.20.x 45e8c5f