Note: contains both the scanner and the new manual setup
Todo:
maybe add qr code assets for other densities than xhdpi
verify merge of master into this branch went ok
make sure all functionality uses the correct preference keys
make use of preference defaults in strings
A test button in the manual setup which will set the lights to purple, like in the scanner
( note: this could be added later via a new PR. This PR is big enough as it is)
Note: contains both the scanner and the new manual setup
Todo: