[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/App/DrawViewSymbol.h

@@ -22,6 +22,8 @@
 
 #ifndef _DrawViewSymbol_h_
 #define _DrawViewSymbol_h_
+
+#include <Mod/TechDraw/TechDrawGlobal.h>
 
 #include <Mod/TechDraw/TechDrawGlobal.h>
 
@@ -41,7 +43,8 @@ class DrawPage;
 class TechDrawExport DrawViewSymbol : public TechDraw::DrawView
 {
     PROPERTY_HEADER_WITH_OVERRIDE(TechDraw::DrawViewSymbol);
-
+    Q_OBJECT
+
 public:
     /// Constructor
     DrawViewSymbol();