No max-width for content modal windows

To solve this i did this:
https://www.drupal.org/project/mercury_editor/issues/3381727 🐛 Vertical and horizontal layout shift Active

Review / test against https://git.drupalcode.org/project/mercury_editor/-/merge_requests/34

I have reviewed this in a few different scenarios using ME on some local tests.

This is no longer happening and is resolved!

Automatically closed - issue fixed for 2 weeks with no activity.