Attempt to improve poor MaskEditor performance under mac

GUI/coregui/Views/MaskWidgets/EllipseView.cpp

@@ -176,7 +176,7 @@ void EllipseView::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 
 void EllipseView::update_view()
 {
-    prepareGeometryChange();
+//    prepareGeometryChange();
     update_bounding_rect();
     update_position();
     update();

GUI/coregui/Views/MaskWidgets/IntensityDataView.cpp

@@ -29,7 +29,7 @@ IntensityDataView::IntensityDataView()
 
 void IntensityDataView::update_view()
 {
-    prepareGeometryChange();
+//    prepareGeometryChange();
     m_bounding_rect = m_adaptor->getViewportRectangle();
     update();
 }

GUI/coregui/Views/MaskWidgets/MaskAllView.cpp

@@ -30,7 +30,7 @@ MaskAllView::MaskAllView()
 
 void MaskAllView::update_view()
 {
-    prepareGeometryChange();
+//    prepareGeometryChange();
     m_bounding_rect = m_adaptor->getViewportRectangle();
     update();
 }

GUI/coregui/Views/MaskWidgets/MaskContainerView.cpp

@@ -29,7 +29,7 @@ MaskContainerView::MaskContainerView()
 
 void MaskContainerView::update_view()
 {
-    prepareGeometryChange();
+//    prepareGeometryChange();
     m_bounding_rect = m_adaptor->getViewportRectangle();
     update();
 }

GUI/coregui/Views/MaskWidgets/PolygonView.cpp

@@ -138,7 +138,7 @@ void PolygonView::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 
 void PolygonView::update_view()
 {
-    prepareGeometryChange();
+//    prepareGeometryChange();
     update_polygon();
     update();
 }

GUI/coregui/Views/MaskWidgets/RectangleView.cpp

@@ -178,7 +178,7 @@ void RectangleView::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 
 void RectangleView::update_view()
 {
-    prepareGeometryChange();
+//    prepareGeometryChange();
     update_bounding_rect();
     update_position();
     update();