TODO:
- Make the side nav go beside the toolbar too
- Extract out common main_activity stuff to remove duplicated code
(cherry picked from commit de35a4c62a7636650b1ff88c33de0cc0695f6411)
# Conflicts:
# app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt
# app/src/main/res/layout/main_activity.xml