Restructuring all CSS so that class gets added to the button instead of the wrapper element.
Delete this maybe?
Revert "Changing some + - stuff."

This reverts commit deef857df89e68a113f98685bf3b263b48ea1532.

Conflicts:
	css/s.css
	css/scss/partials/_invert.scss
	css/scss/partials/_plus-minus-b.scss
	css/scss/partials/_plus-minus.scss
Tweaking styles for markup. Removing burger tilt arrow.
Setting a max-width so that this gets centered in IE 11.
Adding a Dialog polyfill.
Adding modal triggers.
Adding some initial dialog copy.
Fixing flip and invert buttons.
Updating dialog messaging + close button color tweaks.