Fixes https://github.com/go-gitea/gitea/issues/30005. Regression from
https://github.com/go-gitea/gitea/pull/29945.
There was only once instance of `tw-content-center` before that PR, so I
just ran below command and reverted that one instance.
```sh
perl -p -i -e 's#tw-content-center#tw-items-center#g' web_src/js/**/* templates/**/* models/**/* tests/**/*
```
(cherry picked from commit 04f9ad056882fc3f21b247b16f84437adf0f36d8)
Conflicts:
templates/repo/diff/conversation.tmpl
templates/repo/header.tmpl
templates/repo/issue/filter_list.tmpl
templates/repo/issue/view_content/conversation.tmpl
templates/repo/wiki/view.tmpl
web_src/js/components/DashboardRepoList.vue
re-ran the command after discarding the Gitea changes to
ensure all Forgejo files are also covered
1. There is already `gt-ac`, so no need to introduce `flex-item-center`
2. The `flex-item-baseline` and `.flex-item-icon svg { margin-top: 1px
}` seem to be a tricky patch, they don't resolve the root problem, and
still cause misalignment in some cases.
* The root problem is: the "icon" needs to align with the sibling
"title"
* So, make the "icon" and the "title" both have the same height
3. `flex-text-inline` could only be used if the element is really
"inline", otherwise its `vertical-align` would make the box size change.
In most cases, `flex-text-block` is good enough.
![image](https://github.com/go-gitea/gitea/assets/2114189/1b7acfc2-b1c7-4e9c-a983-2fa932026479)
---------
Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Giteabot <teabot@gitea.io>
This PR implements a proposal to clean up the admin users table by
moving some information out to a separate user details page (which also
displays some additional information).
Other changes:
- move edit user page from `/admin/users/{id}` to
`/admin/users/{id}/edit` -> `/admin/users/{id}` now shows the user
details page
- show if user is instance administrator as a label instead of a
separate column
- separate explore users template into a page- and a shared one, to make
it possible to use it on the user details page
- fix issue where there was no margin between alert message and
following content on admin pages
<details>
<summary>Screenshots</summary>
![grafik](https://github.com/go-gitea/gitea/assets/47871822/1ad57ac9-f20a-45a4-8477-ffe572a41e9e)
![grafik](https://github.com/go-gitea/gitea/assets/47871822/25786ecd-cb9d-4c92-90f4-e7f4292c073b)
</details>
Partially resolves #25939
---------
Co-authored-by: Giteabot <teabot@gitea.io>