PD: make sure that Attachment editor shows up the context-menu of datum objects

src/Mod/PartDesign/Gui/ViewProviderDatum.cpp

@@ -236,6 +236,8 @@ void ViewProviderDatum::setupContextMenu(QMenu* menu, QObject* receiver, const c
     QAction* act;
     act = menu->addAction(QObject::tr("Edit datum"), receiver, member);
     act->setData(QVariant((int)ViewProvider::Default));
+    // Call the extensions
+    Gui::ViewProvider::setupContextMenu(menu, receiver, member);
 }
 
 bool ViewProviderDatum::setEdit(int ModNum)

src/Mod/PartDesign/Gui/ViewProviderDatum.h

@@ -29,6 +29,7 @@
 #include <Base/BoundBox.h>
 
 #include <Mod/Part/Gui/ViewProviderAttachExtension.h>
+#include <Mod/PartDesign/PartDesignGlobal.h>
 
 class SoPickStyle;
 class SbBox3f;