In testing Qt 5.3.0 beta, turns out QML is more pedantic about spurious
use of label/property "onText". This commit changes labels like
"<state>Text" (for <state>={"on","off"}) to "label<state>" in order to
avoid confusion with Qt's signals naming, which now suddenly issues an
error when doing `onText =- "On"' out of QML:

Starting /home/npm/android/src/android/build-Qt5_CinematicExperience-
qrc:///Qt5_CinematicExperience.qml:26:5: Type MainView unavailable
qrc:///content/MainView.qml:241:9: Type SettingsView unavailable
qrc:///content/SettingsView.qml:88:13: Type Switch unavailable
qrc:///content/Switch.qml:9:21: Cannot assign a value to a signal
(expecting a script to be run)