[TD]clazy warnings and duplicate setter/getter

- clazy warning re missing Q_OBJECT

- include TechDrawGlobal.h in headers

- resolve duplicate setter/getters

src/Mod/TechDraw/Gui/ViewProviderRichAnno.cpp

@@ -110,8 +110,8 @@ void ViewProviderRichAnno::updateData(const App::Property* p)
     if (p == &(getViewObject()->AnnoParent)) {
 //        Base::Console().Message("VPRA::updateData(AnnoParent) - vpp: %X\n", getViewProviderPage());
         if (getViewProviderPage() &&
-            getViewProviderPage()->getGraphicsScene()) {
-            getViewProviderPage()->getGraphicsScene()->setRichAnnoGroups();
+            getViewProviderPage()->getQGSPage()) {
+            getViewProviderPage()->getQGSPage()->setRichAnnoGroups();
         }
     }