Remove `ShinySet`, rename draw helpers with `Shiny` prefix

[200sc]

There are a set of helpers in the draw package that help draw images to quadrant 4.

One problem with this is it appears ShinySet does not function, and drawing straight to the buffer works instead. The other problem is that they all begin with the prefix 'Shiny', which in a future oak may not be the backing rendering engine a program is using. We should rename them to be more explicit about their operation.