In the send-sweep module as well as in the PayWithQR this removes
the UserIntent handling and instead moves that to the main.qml
exclusively.
Additionally in the send-sweep module the camera work is split
into its own page, like in the other parts of the app. This helps
us avoiding hacks when we want the main functionality without the
camera.
This is the last of the series of reworks, we should have all
former functionality working again.
