Orange theme & better navigation menu
Summary:
- Inlining for easier-to-read code
- Taking advantage of Kotlin's lambdas for cleaner code
- Moving the Home button so it's on the right
- Downgrading because of a bug with the app theme in level 28: https://stackoverflow.com/questions/52017363/theme-error-how-to-fix
- Much better layout with the beta message
- It's orange!
Fixes T280
Test Plan: Get the app and check if it's nice or not
Reviewers: Info-Screen, WyldBot
Reviewed By: Info-Screen
Subscribers: WyldBot, Info-Screen
Maniphest Tasks: T280
Differential Revision: https://phabricator.wildfyre.net/D199