Set modified flag on entry rename

Tools > Customize... > Context Menus. Rename some
entry, click OK. Open the dialog again, notice that
the label modification wasn't saved.

Change-Id: I78a7093e958d9d8709192ac34b6e0f178b7956de

cui/source/customize/cfg.cxx

@@ -2653,6 +2653,7 @@ IMPL_LINK( SvxMenuConfigPage, EntrySelectHdl, MenuButton *, pButton, void )
             m_pContentsListBox->SetEntryText( pActEntry, aNewName );
 
             GetSaveInData()->SetModified();
+            GetTopLevelSelection()->SetModified();
         }
     }
     else