* Add data model for instance configuration
* Support instance.configuration.statuses.max_characters
* Support instance.configuration.statuses.characters_reserved_per_url
* Support instance.configuration.polls.max_options and max_characters_per_option
* Pacify ktlint
* Support instance-configured poll durations
* Fixup versions for migration after rebase
* 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