Fix correct saving to be registered option

Signed-off-by: Frca <killerfrca@gmail.com>
Fix crash when to exams could be loaded

Signed-off-by: Frca <killerfrca@gmail.com>
Few minor changes

Signed-off-by: Frca <killerfrca@gmail.com>
Update gradle files

Signed-off-by: Frca <killerfrca@gmail.com>
Fix crash, update to be registered and change a few icons

Signed-off-by: Frca <killerfrca@gmail.com>