Settings: Navigation bar button color (2/2)

 - add color tint to navbar buttons

Signed-off-by: baked <travp624@gmail.com>

Conflicts:
	res/values/baked_strings.xml
	res/xml/system_ui_settings.xml
Revert "Settings: Navigation bar button color (2/2)"

This reverts commit 9f37d75abd373d77b720fea49652197c9bbf19c9.
Changing the default indicator color to white