PartDesign: Make Base Feature compatible with GeoFeatureGroup. fixes #0003080

The Original BaseFeature implementation had some serious issues with scoped links. It failed completely for e.g. sketches on the BaseFeature as it made a local link to refere to a out of body object. The only solution to make this work correctly is to add a proxy object into the body which is alloed to exactly that, to link outside oof the body. Something like shapebinder.

src/Mod/PartDesign/Gui/AppPartDesignGui.cpp

@@ -62,6 +62,7 @@
 #include "ViewProviderPipe.h"
 #include "ViewProviderLoft.h"
 #include "ViewProviderShapeBinder.h"
+#include "ViewProviderBase.h"
 
 // use a different name to CreateCommand()
 void CreatePartDesignCommands(void);
@@ -154,6 +155,7 @@ PyMOD_INIT_FUNC(PartDesignGui)
     PartDesignGui::ViewProviderPrimitive     ::init();
     PartDesignGui::ViewProviderPipe          ::init();
     PartDesignGui::ViewProviderLoft          ::init();
+    PartDesignGui::ViewProviderBase          ::init();
 
      // add resources and reloads the translators
     loadPartDesignResource();