test: fix flaky omnichannel-units tests

[MartinSchoeler]

Proposed changes (including videos or screenshots)

Subsequent tests were not waiting for the sidebar to close, this could cause some operations to be realised in a previous sidebar that was about to close

Issue(s)

FLAKY-579

[dionisio-bot]

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Latest commit: 5655673

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[github-actions]

PR Preview Action v1.4.8
🚀 Deployed preview to https://RocketChat.github.io/Rocket.Chat/pr-preview/pr-33790/
on branch gh-pages at 2024-11-01 14:06 UTC

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 75.42%. Comparing base (e04a112) to head (5655673).
Report is 59 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop   #33790      +/-   ##
===========================================
- Coverage    75.55%   75.42%   -0.14%     
===========================================
  Files          492      493       +1     
  Lines        21558    21499      -59     
  Branches      5373     5337      -36     
===========================================
- Hits         16288    16215      -73     
- Misses        4630     4644      +14     
  Partials       640      640              

Flag	Coverage Δ
unit	75.42% <ø> (-0.14%)	⬇️

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