Make the app responsive

[colebemis]

Problem

Primer Prism doesn't work on small viewports. Let's make the app usable for small viewports (or at least show a message prompting people to use a larger viewport)

[curtisbarnard]

100% agree. As simple as collapsing that palette menu to the left would make a world of difference.

[noobyogi0010]

@curtisbarnard I would like to work on adding responsiveness to the app if no one has already taken it up.
Thanks!