Move button block width control into Dimensions

[richtabor]

What problem does this address?

Setting a width of a button should be considered a dimension, and moved to that panel.

Do we have insights on the frequency/usage of the width setting? Looking at the pattern directory it seems a width is applied less often. I'm thinking it may be better as turned off by default within the Dimensions tool-belt.

Current:

What is your proposed solution?

Move the Width settings from its own panel to the Dimensions tool-belt, cleaning up the UI a bit.

CleanShot.2022-07-22.at.12.25.10.mp4

[skorasaurus]

somewhat related: a PR that moves the width setting to theme.json and give user the ability to disable the width control as well #42079

[mtias]

The design should also probably switch to the segmented control