fix order of assembly for audio clip editor

gtk2_ardour/audio_clip_editor.cc

@@ -112,11 +112,9 @@ AudioClipEditor::AudioClipEditor (std::string const & name, bool with_transport)
 	load_bindings ();
 	register_actions ();
 
-	build_canvas ();
-
 	build_grid_type_menu ();
-
 	build_upper_toolbar ();
+	build_canvas ();
 	build_lower_toolbar ();
 
 	set_action_defaults ();