* Add black theme
On amoled screens a completely black theme helps save battery,
besides looking awesome!
* Fix first set of merge request issues except the dialog.
* Black theme inherits from dark and only the different values
are declared
* Make nav bar translucent (for some reason content does not
go behind it in main activity. Need to investigate)
* Remove nav bar line
* Fix toolbar color
* Fix dialog issue with black theme.
Revert translucent navigation.
* Translations updated, as well as possible from online sources.
* Make login screen respect black theme
* show ComposeActivity as Dialog on tablets
* limit timeline width on large devices
* limit width on large devices for thread view and search
* increase media preview size on large devices
