UI features?

[MaulingMonkey]

We have a lot of possible reusable UI to expose. Might make that a separate package though.

• Select a controller style prompts
• Controller disconnected prompts
• Unrecognized controller binding setup prompts

Probably out of scope:

• Controller <-> Input binding prompts (too game / game type specific, although I could implement demos)
• On screen keyboards (should just be a new package)