Various arc-green fixes (#13214)
Various arc-green fixes (#13214)

- Style search dropdown
- Fix radio buttons and tweak checkboxes
- Add styling for error form elements
- Make borders brighter and focus more apparent
- Adjust comment box border color to match

Fixes: https://github.com/go-gitea/gitea/pull/12491

Co-authored-by: zeripath <6a547fdd28db89120bdd70d4af1f9ba672ccd43a@cantab.net>
Co-authored-by: techknowlogick <274271a2414b6bd0d2eb0401dd4ff6e85d7016a7@gitea.io>
go-gitea/gitea,sapk-fork/gitea,vdbt/gitea,cez81/gitea,cez81/gitea,go-gitea/gitea,go-gitea/gitea,sapk-fork/gitea,cez81/gitea,sapk-fork/gitea,vdbt/gitea,sapk-fork/gitea