Prox sensor re-integration (#220)

* added arbitrary orientation change

* removed commented code

* updated to OVR 1.4.18

* changed two instances using new to init via array

* moved prox sensor action to haptic instead of Misc

* fixed json file, added prox sensor back for mic mute/un-mute

* added proximity sensor to audio and haptic chaperone warnings

* fixed fall-through behavior

* removed bad prox code

src/res/qml/common/mainwidget.qml

@@ -7,6 +7,7 @@ import "../audio_page"
 import "../motion_page"
 import "../video_page"
 import "../desktop_overlay_page"
+import "../chaperone_page"
 
 Rectangle {
     id: root