Heading selection UX improvements

[aaronshekey]

So glad to see headings landed! There's one slightly weird thing about the UX here.

Let's say you've got a Heading 2:

When I click Heading 1, it toggles all headings off instead of switching the heading 2 to a heading 1. That interaction should select the Heading 1, not toggle off a heading 2. ✌️

🤔

[b-kelly]

Good catch. I'd go so far as to call that a bug, rather than an enhancement. I started on some tests for this area to catch things like this, but apparently I should have finished them rather than leaving them in a TODO state...