BetterUntis 5.0.1

Fixed: messages could be missing from the Info Center completely. When a message carried a field the app did not know (for example a message that requests a read confirmation, which is returned in a separate list), decoding the whole list failed and the Info Center stayed empty until the message was opened and confirmed in another client. The app now ignores unknown fields, keeps messages it cannot fully decode instead of dropping the list, and no longer lets an unreadable cache file block the refresh.