Add possibility to manage more than only one account.
(In ) refs #1605 optimize settings layout/usage and prepare it to manage multiple accounts
(In ) refs #1605 Add possibility to manage multiple accounts. This includes add/delete/deactivate/activate an account. Migrate existing accounts cause the storage of the account information changed. If an account is not already configured, it will display the manage account screen automatically on app start
(In ) refs #1605 mark methods as deprecated
I'll close this ticket now. Works on Android and iOS. Think it will be better to handle further optimizations in separate tickets.