Haz3l checkbox and slider livelits

[7h3kk1d]

Open questions:

• Do we want to have parens after livelit applications in this pass that doesn't support livelit params?
• Should the rendered livelits have a span or other bounding box that fixes the width/height?
  • Currently I'm just styling the input elements

[disconcision]

is there a particular reason you use on_change for the checkbox but on_input for the slider? I don't totally grasp the implications of using one versus the other; i ask mostly because i'm thinking about generic ways to automatically reconcile DOM and model state in more generic contexts

[7h3kk1d]

I had changed the range to use on_input so that the changes are reflected while you're sliding which is really convenient if you're trying to pick a value. I had tried it with the checkbox and had a bug, but now I think that's unrelated. I just tested both with on_input and it seems to work.

Addressed in 58eb82b

[cyrus-]

closing in favor of newer efforts in this direction based on #1218