Reduce size of style.css

The size of our style.css file is quite large ~100k, compressed it is still ~19k. It turns out that when you setup a theme for angular material components the theme mixin generates styles for ALL angular components at build time. We could probably cut this file in half by only generating styles for the components that we use.

https://material.angular.io/guide/theming#theming-only-certain-components