Speed up playwright (pt1: preparation)

[djahandarie]

This is part 1 of a two-part change set that will greatly speed up playwright.

This PR:

• Starts splitting up the visual tests into different tests, in preparation for parallelization
• Switches the dictionary used for the popup test to the very trivial test dictionary so it loads super fast, which is preparation for further splitting up of the visual tests
• Eliminates some unnecessary timeouts by tracking whether we expect the popup to actually show or not per test

The upcoming changes second PR will reap all the gains here, but the change to the screenshots will be more confusing (as the file paths will change, breaking the screenshot differ), so I've decided to split the changes into two so reviewers can see how the screenshots change without the file paths changing in this PR.

Also, I understand that the content of the popup is a little more trivial now, but that is fine, as I plan on building a proper separate set of playwright tests for very complex popups with structured content, SVGs, etc, but that will come later.

[github-actions]

⚠️ Visual changes detected by playwright; please check the report to verify if they are desirable.

[codspeed-hq]

CodSpeed Performance Report

Merging #1717 will not alter performance

_{Comparing speed-up-playwright (c4d41b8) with master (f342886)}

Summary

✅ 5 untouched benchmarks