use WindowManager toggle API for script-manager

gtk2_ardour/ardour.menus.in

@@ -282,7 +282,7 @@
       <menuitem action='set-mouse-mode-object-range'/>
       <separator/>
       <menu action="ActionScripts">
-        <menuitem action='manage-action-scripts'/>
+        <menuitem action='toggle-script-manager'/>
         <separator/>
         <menuitem action='script-action-1'/>
         <menuitem action='script-action-2'/>

gtk2_ardour/ardour_ui.h

@@ -211,8 +211,6 @@ public:
 	void toggle_monitor_section_visibility ();
 	void toggle_keep_tearoffs();
 
-	void lua_script_manager();
-
 	static PublicEditor* _instance;
 
 	/** Emitted frequently with the audible frame, false, and the edit point as

gtk2_ardour/ardour_ui_dialogs.cc

@@ -922,9 +922,3 @@ ARDOUR_UI::toggle_monitor_section_visibility ()
 			mixer->show_monitor_section (tact->get_active());
 	}
 }
-
-void
-ARDOUR_UI::lua_script_manager ()
-{
-	lua_script_window.show ();
-}

gtk2_ardour/editor.cc

@@ -5726,12 +5726,6 @@ Editor::session_going_away ()
 	SessionHandlePtr::session_going_away ();
 }
 
-void
-Editor::manage_action_scripts ()
-{
-	ARDOUR_UI::instance()->lua_script_manager();
-}
-
 void
 Editor::trigger_script (int i)
 {

gtk2_ardour/editor.h

@@ -1618,7 +1618,6 @@ class Editor : public PublicEditor, public PBD::ScopedConnectionList, public ARD
 
 	void initialize_canvas ();
 
-	void manage_action_scripts ();
 	void set_script_action_name (int i, const std::string&);
 
 	/* display control */

gtk2_ardour/editor_actions.cc

@@ -475,9 +475,6 @@ Editor::register_actions ()
 
 	myactions.register_action (editor_actions, X_("cycle-zoom-focus"), _("Next Zoom Focus"), sigc::mem_fun (*this, &Editor::cycle_zoom_focus));
 
-	reg_sens (editor_actions, "manage-action-scripts", _("Manage"),
-				sigc::mem_fun(*this, &Editor::manage_action_scripts));
-
 	for (int i = 1; i <= 9; ++i) {
 		string const a = string_compose (X_("script-action-%1"), i);
 		string const n = string_compose (_("Unset #%1"), i);

gtk2_ardour/lua_script_manager.cc

@@ -109,12 +109,6 @@ LuaScriptManager::LuaScriptManager ()
 	callback_selection_changed ();
 }
 
-bool
-LuaScriptManager::on_delete_event (GdkEventAny*)
-{
-	return false;
-}
-
 void
 LuaScriptManager::session_going_away ()
 {

gtk2_ardour/lua_script_manager.h

@@ -31,7 +31,6 @@ public:
 	LuaScriptManager ();
 
 protected:
-	bool on_delete_event (GdkEventAny*);
 	void session_going_away();
 
 private: