Step 4.5

- Ready check now blacken the screen and leave queue button is no longer
available during it.
- App object has a new method : confirm. It blackens the screen and
displays a popup that contains what you want and have a custom callback.
- Login and Register forms no longer keep informations after validation,
they are erased instantly for security reasons.
- When you delete a character, it asks for your password with the new
confirm method. An input type password is displayed within the confirm
box to type the password.
- Some code improvements in multiple files.