Merge branch 'CHK-23' into 'master'

CHK-23: Prevent SecretCodeReceiver from disabling MainActivity

The SecretCodeReceiver was disabling the MainActivity in the package manager upon first boot. 
The reason we did not see this happen before was because the SecretCodeReceiver was launching a different activity (ModuleChooser) than the Settings app (MainActivity). Since version 2.0.0 both point to the same activity (MainActivity), so since then the issue has arisen.

The reason why our SecretCodeReceiver behaved like this is because it comes from the Hi-P test app. There you see a launcher icon, upon first launch it registers the SecretCodeReceiver and disables the launcher icon.

See merge request !19