Contents' UIs should probably be improved, but that can happen separately.
(cherry picked from commit 73080902885c9d219f5534002ccf5d16a07a678f)
# Conflicts:
# app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderActivity.kt
# app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderViewModel.kt