Adjust style for action run list (align icons, adjust padding) (#25170)
Main changes:
- Moved the icon into `action-item-main`, and make it `position:
absolute` to allow add margin it to align with `issue-item-top-row`.
- Adjusted padding and color of texts.
# Before
<img width="721" alt="Screen Shot 2023-06-09 at 17 04 38"
src="https://github.com/go-gitea/gitea/assets/17645053/3fc00e94-bcd4-4e06-b1d8-93be0576dbc3">
# After
<img width="1421" alt="Screen Shot 2023-06-09 at 18 32 47"
src="https://github.com/go-gitea/gitea/assets/17645053/c2a0f9df-cac4-4197-9cbd-6c16dfef215b">
On hover:
<img width="1431" alt="Screen Shot 2023-06-09 at 18 32 54"
src="https://github.com/go-gitea/gitea/assets/17645053/d0ab6fde-9722-4d76-831b-163fd6a1f560">
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