**Backport:** https://codeberg.org/forgejo/forgejo/pulls/11547
- For small modals fomantic tried to add a `scrolling` class using a function that was not implemented, this function is now stubbed.
- There's not really a need to conditionally change the behavior of scrolling or not, we can specify `overflow-y: auto` which is more than enough to take care of this. We do add some layout changes to ensure the modal is fully scrollable.
- Refactor to nested CSS.
- Resolvesforgejo/forgejo#10991
Co-authored-by: Gusted <postmaster@gusted.xyz>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/11560
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
Co-authored-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
Co-committed-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
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