* Merge AMOLED and regular dark themes
This allows all variants of dark themes to use black backgrounds as a
separate preference.
* Merge light and dark themes
* Fix ReaderSeekBar color on Dark Blue theme
* Color fixes
* Fix Dark Blue bars ripple
* Simplify night mode check
* Match ReaderActivity theme with the rest of the app
* Fix viewer inset when fullscreen reader is off
* Fix incorrect toolbar color after recreate
* Remove animated inset
* Move isDarkMode to PreferencesHelper
* Edge-to-edge bottom sheet when possible
* ReaderSettingsSheet: Animate background dim changes
* Adjust modal bottom sheet in-out animation
* Use public method to get bottom sheet behavior
* Set bottom sheet peek size to 50% screen height
The current auto peek height gives too low value on landscape orientation
* Set bottom sheet navigation bar scrim when needed
