forked from github/szkolny

* [App] Add base for AppData loading. * [UI] Fix timetable widget date navigation. * [UI] Migrate register-specific behavior to use AppData. * [App] Implement new delegate-based config base. * [Config] Migrate config and profile config. * [Config] Remove defaults from migrations. * [App] Apply event types and config overrides from AppData. * [Events] Change default event types for university type school.