Support wrapped lists

[GNUGradyn]

Hello. I am using your library to build an emoji picker as part of a larger project. I have implemented it, but run into a problem. Since the list of emojis wraps (renders left>right and then top>bottom), it only renders a few emojis. You can scroll past the emojis. It is technically possible to circumvent this using a dynamically sized grid with the following logic

• columns should be as small as possible for the emoji cells, ignoring the title cells
• title cells should occupy as many columns as possible
• each title column should be preceeded by enough empty columns to finish filling the previous row

but this is quite complex for such a simple task.

Add support for wrapped lists

[GNUGradyn]

I tried to implement the more complex method I described, but concluded this is actually not possible since I do not see any way 1 element can span multiple rows.