New Tweak: Stacked badges

[marcustyphoon]

Q: why
A: it was a more fun use of half an hour than trying to instrument an intentionally-delayed domcontentloaded event okay

Description

Adds a tweak that stacks the "important internet checkmarks" unless you hover over them.

Slightly out of date hover animation demo:

Testing steps

• Confirm that badges are stacked, can be hovered, animate correctly, and still have popups when hovered.
• Confirm that stacked badges appear correctly in the regular and community header.

[marcustyphoon]

https://developer.mozilla.org/en-US/docs/Web/CSS/transition-behavior

Hey, look, a new CSS thingy. Firefox nightly only at the moment, but probably coming soon. Useful for that old "scroll to bottom button needs to change visibility after a delay to match the scroll to top button" situation, possibly? Can't remember how or if we solved that.

[marcustyphoon]

• do something about multiple rows in new header