1. Tweak diff header and remove a numbe of unneeded CSS for it: Before: <img width="433" alt="Screenshot 2024-02-18 at 01 08 09" src="https://github.com/go-gitea/gitea/assets/115237/d8b377c0-57bc-44d5-bb57-a582c7d4b3b4"> After: <img width="463" alt="Screenshot 2024-02-18 at 01 07 56" src="https://github.com/go-gitea/gitea/assets/115237/d08c17e7-5b86-4d07-81da-6371f4754325"> 3. Reduce height of review textarea and also reduce fomantic's CSS from 12em to 8em. Now fits better on my screen: <img width="1352" alt="image" src="https://github.com/go-gitea/gitea/assets/115237/5c658d13-295e-4929-94da-13ade888020d"> --------- Co-authored-by: delvh <dev.lh@web.de> (cherry picked from commit 39f8ab591c18a65cf783ecd17ddc1a5914ceff7a)
