Please see the parent epic for the criteria/needs for this mockup.

In short, anywhere a machine size in AWS needs to be selected, we need to make the menu more usable and smart for the UX.

The attached image is the current machine-size selector.

We should probably consider that the similar UI elements will be needed for doing the same menu with Azure cloud ARO clusters as well, in the future, so flexibility for that is a good forethought.

Design: https://www.sketch.com/s/c96f469a-3a3f-44a6-a7c0-e22db5eb68b3/prototype/21BBD0C4-1D0E-4CD3-A9AC-816552B5ABE0/a/6579003C-7038-4303-8AE4-D7B784ECF9E1