Fix diff detail buttons wrapping, use tippy for review box (#23271) (#23546)
Backport #23271 by @silverwind
Fix visual regression introduced by
https://github.com/go-gitea/gitea/pull/22986.
Before:
<img width="1277" alt="image"
src="https://user-images.githubusercontent.com/115237/222792814-d70c2173-0c7c-4db2-8839-95be63cdc8ee.png">
<img width="649" alt="image"
src="https://user-images.githubusercontent.com/115237/222792989-9b1f5e12-becd-40cc-b02c-e9f59a8e72a4.png">
After:
<img width="1274" alt="image"
src="https://user-images.githubusercontent.com/115237/222792769-e7a9702f-4b6a-46c4-9385-da103ed4dff0.png">
<img width="565" alt="image"
src="https://user-images.githubusercontent.com/115237/222793084-6de6482b-11dc-4d38-b514-15884d20e140.png">
Co-authored-by: silverwind <me@silverwind.io>
4b763d8d37
