Closes #11400 Overflow is handled by javascript to show a button instead of horizontally scrolling, this is not the case when javascript is disabled. Add CSS to handle overflow, does not interfere with the javascript. ## Testing 1. Go to any repository. 2. Turn off javascript. 3. Make viewport width small. 4. Observe that repository menu under the repository header doesn't overflow. Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/11614 Reviewed-by: 0ko <0ko@noreply.codeberg.org> Reviewed-by: Beowulf <beowulf@beocode.eu> Co-authored-by: Artyom Bologov <git@aartaka.me> Co-committed-by: Artyom Bologov <git@aartaka.me>