* Theme refactoring
* disable the automatic tinting of surfaces with elevation in dark mode
* make the media warning visible again with the dark theme
* fix nav bar on api 27+
* use correct color for all media warnings
* Implement instance mutes. #1143
* Move new classes to instancemute component
* Add progress bar while instance list loads
* Add undo snackbar for instance unmuting
* Update display text for instance mutes