Description of bug: Device password change does not work
iOS software version: iOS 13.4.1
Phone: iPhone Xs
Car: A4 B9
Steps to reproduce:
1. Launch app & connect OBDEleven 2 device & enter correct device password
2. Navigate to Other -> Devices -> OBDeleven 2 device
3. Initiate Change Password
4. Fill up old, new password, confirm new password
5. Tap at Apply
=> nothing happens, Change password dialog just disappears, no password change confirmation displayed
6. Disconnect device & quit app
7. Launch app again, reconnect dongle to car
8. Connect device
=> device password request dialog appears
9. Type in new password
=> Wrong password error displayed
10. Type in old password
=> Old password accepted.
NOTE: Issue is reproducible also in the official release of OBDeleven version in App Store.