Since the default option to 'sign' is a self-signed certificate which is
insecure (its in git, absolutely not private), it makes sense to be consistent
and make the default create a test package.
Make it easier on people self-compiling.
This makes it possible for the mobile app on Android to use the camera.
We only ask for permission when the user actively goes to the 'QR-Scan'
tab, and we show a simple preview of the camera feed.
Notice that the permissions stuff is quite ugly right now due to Qt
having that module in development and the public APIs are simply not
available yet. But at least it works, which is all that matters.
When the next minor Qt release comes out we can hopefully clean this
up and use a version that needs no ifdefs.
tomFlowee