fix code styles in feed list

[wxiaoguang]

No description provided.

[silverwind]

I don't approve. See go-gitea#21432 (comment).

[wxiaoguang]

For a full context, copy some comments here.

Let's keep the discussion in main PR.

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It's unnecessary. Most time the !important used is improper. We have discussed many times. Like this one:

• Fix position of label color picker colors go-gitea/gitea#17866 (comment)

And https://en.wikipedia.org/wiki/Occam's_razor "entities should not be multiplied beyond necessity"

Every element could have their proper styles accurately.

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In most times, when !important is used, it means that there is some essential design problem in code, or something is wrongly used (like go-gitea#17866)

Gitea's frontend is messy, do not make it more messy.