TechDraw: Implement 'Area' dimension.

src/Mod/TechDraw/Gui/ViewProviderDimension.cpp

@@ -196,6 +196,8 @@ void ViewProviderDimension::setPixmapForType()
         sPixmap = "TechDraw_AngleDimension";
     } else if (getViewObject()->Type.isValue("Angle3Pt")) {
         sPixmap = "TechDraw_3PtAngleDimension";
+    } else if (getViewObject()->Type.isValue("Area")) {
+        sPixmap = "TechDraw_ExtensionAreaAnnotation";
     }
 }