Navicube OffsetX and OffsetY fix

The navigation cube didn't load parameters OffsetX and OffsetY on creation of a new 3D view. See https://forum.freecad.org/viewtopic.php?p=686678#p686678

src/Gui/View3DSettings.cpp

@@ -455,6 +455,7 @@ void NaviCubeSettings::applySettings()
     parameterChanged("EmphaseColor");
     parameterChanged("HiliteColor");
     parameterChanged("CornerNaviCube");
+    parameterChanged("OffsetX"); // Updates OffsetY too
     parameterChanged("CubeSize");
     parameterChanged("ChamferSize");
     parameterChanged("NaviRotateToNearest");