Make capsules a subset of item-with-label

[raiguard]

Hello. I would like to request that capsules be made a subset of item-with-label. The reasoning behind this is so I can display the current selection dimensions for my tape measure mod, like this:



Additionally, it would be nice if we could use newlines in item labels, and make it so the text stays to the right of the pointer unless the screen edge is too close. Though those aren't nearly as important as just being able to use them with capsules.

Thanks!