List block: confusing icons

[ellatrix]

Describe the bug

In my opinion, the icons for the list type look very similar to each other. Every time I want to change the list type it takes me some time to get the right one. The numbering could be a little bit bigger, or it could include also 2 and 3. I'm not sure what the purpose is of the upper line? Cc @jasmussen

[ZebulanStanphill]

I also don't get the point of the upper line; I would think that the line should be on the bottom, not the top. But yeah, putting a 2 below the 1 would work as well.

[jasmussen]

I think we could explore replacing the top line with another bullet in both of those!

[ellatrix]

@jasmussen Thank you! I think it's an easier pattern to recognise when there's more than one bullet or number.

[ellatrix]

Fixed in #22593.