Mobile design Modal

[ktalebian]

• [x] I have searched the Issues to see if this bug has already been reported
• [x] I have tested the latest version

Summary

On mobile, a Modal makes sense to open more like the screenshot below (i.e., 100% width, stuck to the bottom of the page, and slides open from the bottom) instead of an actual modal centred on the screen.

Context

Would like to have the modal be more responsive to native mobile design.