Revert scale change back to 0.8

Author: ada-tv

libraries/display-plugins/src/display-plugins/hmd/HmdDisplayPlugin.cpp

@@ -214,7 +214,7 @@ void HmdDisplayPlugin::internalPresent() {
         float newWidth = sourceSize.x - shiftLeftBy;
 
         // Experimentally adjusted the region presented in preview to avoid seeing the masked pixels and recenter the center...
-        static float SCALE_WIDTH = 1.0f;
+        static float SCALE_WIDTH = 0.8f;
         static float SCALE_OFFSET = 2.0f;
         newWidth *= SCALE_WIDTH;
         shiftLeftBy *= SCALE_OFFSET;