[WIP] View Topics List in Stream Panel.

[plugyawn]

What does this PR do?

Tested?

• [x] Manually
• [ ] Existing tests (adapted, if necessary)
• [ ] New tests added (for any new behavior)
• [ ] Passed linting & tests (each commit)

Commit flow

• Doesn't include the search-box yet. Will add soon.

Interactions

• Will be made better by a PR to add topic-hints.

Visual changes

[plugyawn]

@neiljp I was working on this, it's half-done, and some of the code that went into this is based off of the code for searching through topics on the side-bar, but I think it's at least close to a feature that we should support.

I'll get the topic-hints PR ready soon, but I'd like your opinion on this.

[zulipbot]

ERROR: Label "PR awaiting feedback" does not exist and was thus not added to this pull request.

[zulipbot]

ERROR: Label "PR awaiting review" does not exist and was thus not added to this pull request.

[plugyawn]

@zulipbot add "PR needs review".

[neiljp]

@plugyawn This is an interesting exploration - it took me some time to figure out how to get the popup, as this is contextual on the message, not 'view topics list in stream panel' as in the title here.

Left some notes in the stream since this is more at concept stage.

[zulipbot]

Heads up @plugyawn, we just merged some commits that conflict with the changes you made in this pull request! You can review this repository's recent commits to see where the conflicts occur. Please rebase your feature branch against the upstream/main branch and resolve your pull request's merge conflicts accordingly.