Fix extra spacing below project nav

[jennifer-shehane]

• close Extra css spacing below Desktop GUI menu #7023

User facing changelog

• We fixed some extra spacing displaying below the project nav in the Test Runner.

Additional details

• I added a percy snapshot test

How has the user experience changed?

Before

After

PR Tasks

• Have tests been added/updated?
• Has the original issue been tagged with a release in ZenHub?

[cypress-bot]

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PR Review Checklist

If any of the following requirements can't be met, leave a comment in the review selecting 'Request changes', otherwise 'Approve'.

User Experience

• The feature/bugfix is self-documenting from within the product.
• The change provides the end user with a way to fix their problem (no dead ends).

Functionality

• The code works and performs its intended function with the correct logic.
• Performance has been factored in (for example, the code cleans up after itself to not cause memory leaks).
• The code guards against edge cases and invalid input and has tests to cover it.

Maintainability

• The code is readable (too many nested 'if's are a bad sign).
• Names used for variables, methods, etc, clearly describe their function.
• The code is easy to understood and there are relevant comments explaining.
• New algorithms are documented in the code with link(s) to external docs (flowcharts, w3c, chrome, firefox).
• There are comments containing link(s) to the addressed issue (in tests and code).

Quality

• The change does not reimplement code.
• There's not a module from the ecosystem that should be used instead.
• There is no redundant or duplicate code.
• There are no irrelevant comments left in the code.
• Tests are testing the code’s intended functionality in the best way possible.

Internal

• The original issue has been tagged with a release in ZenHub.

[cypress]

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Test summary

7179 • 1 • 98 • 0

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Run details

Project	cypress
Status	Failed
Commit	f4653e0
Started	Apr 16, 2020 2:46 PM
Ended	Apr 16, 2020 2:53 PM
Duration	06:29 💡
OS	Linux Debian - 10.1
Browser	Multiple

View run in Cypress Dashboard ➡️

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Failures

	cypress/integration/e2e/focus_blur_spec.js ⏯		1
1	intercept blur methods correctly > focus

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[chrisbreiding]

I found that switching to Firefox (with the beta tag) caused the spacing to reappear.

I updated the CSS to make the nav bar items more flexible in case the navbar height changes again. I also made sure the browsers in the dropdown are a consistent height, because otherwise changing between them causes the height change, making the text shift, which is somewhat jarring.

Edit: Also added a percy snapshot test for when a beta browser is displayed.