FSE: sidebar has incorrect breaking point

[corsonr]

The .edit-site-layout__sidebar-region container in the sidebar in FSE view has an incorrect breaking point, leading the UI to display the sidebar with an unwanted gap to its right at exactly 782px viewport.

[sabernhardt]

Hi and thanks for the report!

I mentioned this on a similar issue involving the post editor.
​https://github.com/WordPress/gutenberg/issues/55349

I think the same pull request could solve both. If not, this might need its own issue opened on the Gutenberg repository.

[karmatosed]

Thank you for reporting this as there are similar issues, I think closing this and leaving updates on the existing ones makes sense. However, if further information does come up please raise it over in the Github repo.