feat(pr review): add more space on mobile (#21326)
feat(pr review): add more space on mobile (#21326)

This PR adds more space to the review screen on mobile so that comments
are more readable and less "squashed" an smaller screens.

Before:

![Screen Shot 2022-10-03 at 17 12
26](https://user-images.githubusercontent.com/13721712/193612834-6add9e25-f635-4a5b-84f6-b8e2b320ec29.png)

After:

![Screen Shot 2022-10-03 at 17 10
15](https://user-images.githubusercontent.com/13721712/193612671-ab4ef640-0360-44ef-9184-b366b7abeb37.png)

Co-authored-by: techknowlogick <274271a2414b6bd0d2eb0401dd4ff6e85d7016a7@gitea.io>
Co-authored-by: Lauris BH <f3041c4c693c07149804ea655e75ee8bb856bd26@nix.lv>
go-gitea/gitea,go-gitea/gitea,go-gitea/gitea