Orbot can't be told to exit
Orbot can be told to stop Tor, but it still sits in the notification area. It would be polite to offer users a button to quit Orbot, and stop it being visible (other similar applications like ConsoleBot and AndChat do this).
Force quit works, but it is a pain to find without having to install an additional application like MemoryCleaner.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information