Improve integration with weForms & Crio

[nicolepaschen]

At this time the field labels are always black without a way to make them contrast on dark backgrounds:

Also there's too much space between fields. The button should have button-primary class.

[nicolepaschen]

Also see #372

Some fields are transparent some are white background with Crio:

[nicolepaschen]

Added controls to Customizer > Design > weForms for the labels

Button color and spacing need to be addressed in weForms directly

[nicolepaschen]

@jamesros161 please ensure the text on the pink background is always black - when you submit without entering info in required fields.