Core/Gui: Render primitives on top of the scene in PickGeometry

+ added some better grouping for items, which are assigned per object
  right now. For example, if we exceed 10 items per object it gets an
  additional group.

Co-authored-by: realthunder <realthunder@users.noreply.github.com>

src/Gui/Selection/Selection.cpp

@@ -2604,3 +2604,13 @@ PyObject *SelectionSingleton::sGetSelectionFromStack(PyObject * /*self*/, PyObje
     }
     PY_CATCH;
 }
+
+bool SelectionSingleton::pickGeometryActive = false;
+
+bool SelectionSingleton::isPickGeometryActive() {
+    return pickGeometryActive;
+}
+
+void SelectionSingleton::setPickGeometryActive(bool active) {
+    pickGeometryActive = active;
+}