Add message box styles and migrate old styles

In the app navigate to one activity and submit it in offline mode. Check that the box that explains that there are some data to be synced is correctly formatted. Navigate to a choice activity closed by date. Check there's a blue box informing the user that the choice is closed. There are many places where the warnings and inline errors or info boxes have the same design. I.e. In the notification preferences, tap & drop question types on quizzes...