[stable31] Fix permission change in text doc

[backportbot]

Backport of #8746

Warning, This backport's changes differ from the original and might be incomplete ⚠️

Todo

• Review and resolve any conflicts
• Review and verify the backported changes
• Amend HEAD commit to remove the line stating to skip CI

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Learn more about backports at https://docs.nextcloud.com/server/stable/go.php?to=developer-backports.

[silverkszlo]

if we want to merge this PR, we should set this back to 30000

[samin-z]

@silverkszlo @max-nextcloud stable31 is also now aligned with other versions, no custom changes, another round of review is highly appreciated.

[silverkszlo]

Thank you for tackling that! I tested it and it works nicely. I just commented some small things. There is one unrelated bug:

The browser console throws a lot of these errors:

That can be fixed by adding the useIsRichWorkspaceMixin to ReadonlyBar.vue. That actually only applies to stable31, because later stables and main then use the useEditorFlags() composables instead of the provide/inject mixin pattern. I'll fix that in a separate PR.