entering cloud PIN in Subsurface-mobile

[Dirk Hohndel]

This was something I really, really wanted to implement so that users can start out with Subsurface-mobile without needing to go back to the desktop app in order to create the cloud account.

As always, I ran out of time. This needs some SERIOUS testing. Please, please try. New builds for Android and iOS are on their way to the servers. You'll need to create new cloud storage accounts in order to test this (otherwise there wouldn't be a need to enter the pin). Please just use alternate email addresses and let me know afterwards which accounts I can remove.

Willem, this obviously needs a change in the user manual. My apologies. I didn't know if I'd find the time to do this, but when I had a block of a few hours open I just went for it...

/D