Improve styling for select list appearances

#### Web Forms version and package (e.g. are you using `web-forms` or only the engine?)
0.4.0

#### Problem description
For select list-related appearances, I believe the intent was for the labels to be constrained to 30% of the screen for large screens. It looks like that was flipped and so options generally wrap and are more likely not to line up

#### Steps to reproduce the problem
Look at a form like the All Questions Type form with the list appearances.

#### Expected behavior
Labels use 30% of screen, options use 70%