fix(files): Right click menu position

[Pytal]

• Fix [Bug]: Right click menu wrong position #43842
• Supersede fix(files): right click actions menu #43254

Summary

• Because the actions menu is contained within the files list already, meaning that transform: translate3d(0px, 0px) sticks the menu to the top right of the files list, we set the correct root to the files list element
• For the x position we now subtract the the contentRect.left to always take the sidebar into account
  • Previously we just used clientX which is relative to the viewport rather than the files list container
• For y sometimes event.clientY - contentRect.top is greater than contentRect.top e.g. for the first file but since the menu is already in the container we can remove the Math.max and just subtract the contentRect.top

Before	After

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[Pytal]

/backport to stable28

[SystemKeeper]

Bildschirmaufnahme.2024-03-11.um.22.26.29.mov

Works for me only when the menu opens to the bottom. If it opens to the top, it is still mis-aligned.

[SystemKeeper]

Bildschirmaufnahme.2024-03-11.um.22.32.14.mov

Also it only works when we have not scrolled the files list, ref #43300