Copy and paste -> Fixed paste for multivolumes copies

src/slic3r/GUI/GUI_ObjectList.cpp

@@ -463,6 +463,12 @@ void ObjectList::paste_volumes_into_list(int obj_idx, const ModelVolumePtrs& vol
     m_parts_changed = true;
     parts_changed(obj_idx);
 
+    if (items.size() > 1)
+    {
+        m_selection_mode = smVolume;
+        m_last_selected_item = wxDataViewItem(0);
+    }
+
     select_items(items);
 #ifndef __WXOSX__ //#ifdef __WXMSW__ // #ys_FIXME
     selection_changed();

src/slic3r/GUI/Selection.cpp

@@ -1795,6 +1795,7 @@ void Selection::paste_objects_from_clipboard()
         dst_object->translate(10.0, 10.0, 0.0);
         object_idxs.push_back(m_model->objects.size() - 1);
     }
+
     wxGetApp().obj_list()->paste_objects_into_list(object_idxs);
 }