No Render Fix, Color/Brightness Sort Order, readme adjustment (#550)

* Adjust Brightness/Color Overlay Sort Orders for better app complienc

* No Overlay Render Attempt fix

* change readme update version string

src/tabcontrollers/VideoTabController.cpp

@@ -66,6 +66,8 @@ void VideoTabController::initBrightnessOverlay()
                 m_brightnessOverlayHandle,
                 vr::k_unTrackedDeviceIndex_Hmd,
                 &notificationTransform );
+            vr::VROverlay()->SetOverlaySortOrder( m_brightnessOverlayHandle,
+                                                  sortMax );
         }
         else
         {
@@ -109,6 +111,8 @@ void VideoTabController::initColorOverlay()
                 m_colorOverlayHandle,
                 vr::k_unTrackedDeviceIndex_Hmd,
                 &notificationTransform );
+            vr::VROverlay()->SetOverlaySortOrder( m_brightnessOverlayHandle,
+                                                  sortMax );
         }
         else
         {

src/tabcontrollers/VideoTabController.h

@@ -128,6 +128,7 @@ class VideoTabController : public QObject
                     setColorOverlayOpacity NOTIFY colorOverlayOpacityChanged )
 
 private:
+    static constexpr uint32_t sortMax = 0xffffffff;
     unsigned settingsUpdateCounter = 0;
 
     // how far away the overlay is, any OVERLAY closer will not be dimmed.