Major visual updates

Incorporates various visual updates, including the header color of the drawer to blue, various spacing and text size/color changes.

What's Changed

• feat(Drawer): Visual updates w/ Alerts and Prereq by @CooperRedhat in #70
• Add configuration to opt-out of new header colors by @CooperRedhat in #94
• version 2.0 by @CooperRedhat in #97

Full Changelog: 1.4.0...2.0.0