Convert components using lang="scss" style blocks to plain css

[zackkrida]

Many of our components use Sass in their style blocks instead of plain CSS. These should be converted to Tailwind where possible and scss should be eliminated. Many components with <style lang="scss"> aren't even using Sass features.

This reduces reliance on yet another technology in our toolchain, encourages better practices (if you feel like you need a loop/control structure in your css, you should probably write a Vue component instead of whatever logic you're writing), and, down the line, as part of the Remove legacy styles milestone, would let us remove around 6mb of dev dependencies, sass and sass-loader.