Scrollbars showing in mobile view

[max-nextcloud]

Describe the bug
With current master when opening a text in a small screen such as a mobile there are two scrollbars showing at the right.
This also leads to the menubar overflowing again.

To Reproduce
Steps to reproduce the behavior:

1. Open a text file
2. Set your browser dev tools to use pixel 5 screen size
3. enter halve a page - maybe a bit more
4. See two scrollbars at the side.

Expected behavior
The content should fit the screen.

Screenshots

Client details:

• OS: linux
• Browser: chromium with dev tools set to mobile view of pixel 5
• Version: NC 24
• Device: desktop

[szaimen]

Related: #2203 (comment)