Version 3.0 * use freshly designed AppIntro fragments instead of the previous start-up fragments * About dialog: show translations, updated library view * use latest version of okhttp (4.5 instead of 3.12); dropping support for API level <21 (Android 5) * support for Brotli HTTP compression (if supported by server) * Nextcloud Login Flow: show progress bar and error messages if something goes wrong * many small bug fixes, improvements, optimizations Version 3.0-ose1, 3.0-ose2: fix crash caused by empty drawable