chore: fighting some visual flake

[bahmutov]

Noticed a little bit of visual flake in #15117
https://percy.io/cypress-io/cypress/builds/8878688/changed/503718844

• ensure animation has finished when logging out
  

• ensure the error message is shown
  

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[cypress]

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Test summary

9322 • 1 • 118 • 3 • 1

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Run details

Project	cypress
Status	Failed
Commit	d737468
Started	Feb 17, 2021 1:25 AM
Ended	Feb 17, 2021 1:36 AM
Duration	10:25 💡
OS	Linux Debian - 10.5
Browser	Multiple

View run in Cypress Dashboard ➡️

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Failures

	cypress/integration/commands/waiting_spec.js		1
1	... > errors > throws when waiting for 2nd response to route

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Flakiness

	cypress/integration/retries.ui.spec.js		1
1	runner/cypress retries.ui.spec > opens attempt on each attempt failure for the screenshot, and closes after test passes

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[chrisbreiding]

These and some other flaky snapshots should be taken care of in #15537.