Keep video controls row from overflowing to the left

[Arnei]

For resolutions with small widths, the elements of the video control row
would visibly overflow, for example into the main menu. Overflow should
now be "hidden" like e.g. in the cutting actions row.

(Contains #892)

[github-actions]

This pull request is deployed at test.editor.opencast.org/908/2022-11-18_14-57-41/ .
It might take a few minutes for it to become available.

[lkiesow]

This doesn't really seem to work:

[Arnei]

Dammit, true enough.

I would like to revise my statement. This PR keeps the row from overflowing towards the left specifically. Notice how Preview Mode moves into the subtitle list

[github-actions]

This pull request has conflicts ☹
Please resolve those so we can review the pull request.
Thanks.

[github-actions]

This pull request is deployed at test.editor.opencast.org/908/2022-12-19_08-42-33/ .
It might take a few minutes for it to become available.

[github-actions]

This pull request has conflicts ☹
Please resolve those so we can review the pull request.
Thanks.

[github-actions]

This pull request is deployed at test.editor.opencast.org/908/2023-06-12_07-30-33/ .
It might take a few minutes for it to become available.

[LukasKalbertodt]

Works and code looks good!

(And yes, as previous comments say, there are still lots of other problems with narrow screens, but this is an improvement, so why not merge)