Make special filters selectable

My current issue search query looks like this:

I would expect Ctrl + A Backspace or Ctrl + A Del to clear the field, but it only deletes foo-bar. Or Ctrl + A Ctrl + C should copy everything (in the clipboard as Label=~"🍎" foo bar).

I'd also expect to delete either the whole Label=~"🍎" with one Ctrl + Backspace or with 3 (1x for each element).

This also applies in say linked issues:

I'd expect backspace to delete #1, but it doesn't.

Probably the best way to solve this is to make special queries text, while rendering them nicely.