New Tweak: Show tags on filtered posts

[marcustyphoon]

Description

Resolves #1664.

Testing steps

[marcustyphoon]

This layout is somewhat limited by the CSS-only method; we could certainly insert more DOM elements to have more flexibility. That I can think of, it would require adding wrappers (as we did in #562, for example), which I generally like to avoid.

One thing I thought about was putting float: right on the view post button in the collapsed layout; would that enable vertically centering it in this case? Is that better? Eh. I'm not much of a designer.

[AprilSylph]

Is this a draft or is it pending my review? It can't be both.

• If the PR is considered non-viable in its current state, it should be a draft
• If a draft is kept open, that indicates that someone is expected to work on it until it is viable
• If the person expected to work on the draft is not the PR author, they should be an assignee on the draft
• If the PR is considered viable in its current state by the author or assignee, it should be marked as ready for review