* Move `> .merge-section` to `> .content` scope
- Fixes a issue that started from
https://github.com/go-gitea/gitea/pull/17317
- Move `> .merge-section` to the `> .content` scope.
- Resolves#17480
* Move `.merge-section` back to outside scope
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>