Remove duplicate code.

data/ladi-player.ui

@@ -192,7 +192,7 @@
     <accel-groups>
       <group name="accelgroup1"/>
     </accel-groups>
-    <signal name="destroy" handler="on_quit" swapped="no"/>
+    <signal name="destroy" handler="quit" swapped="no"/>
     <child>
       <object class="GtkBox" id="box1">
         <property name="visible">True</property>
@@ -290,7 +290,7 @@
                         <property name="use_stock">True</property>
                         <property name="accel_group">accelgroup1</property>
                         <accelerator key="q" signal="activate" modifiers="GDK_CONTROL_MASK"/>
-                        <signal name="activate" handler="on_quit" swapped="no"/>
+                        <signal name="activate" handler="quit" swapped="no"/>
                       </object>
                     </child>
                   </object>

ladi-player

@@ -52,15 +52,12 @@ class LadiPlayer(LadiManagerGtk, LadiApp):
     def on_about(self, *args):
         LadiManagerGtk.on_about(self, parent=self.window_main, version=get_version_string())
 
-    def quit(self, *args):
+    def quit(self, *args, **kwargs):
         self.global_config.set_config_section (self.appname,
                                                self.config_dict)
         self.global_config.save()
         Gtk.main_quit()
 
-    def on_quit(self, *args, **kwargs):
-        self.quit()
-
     def _run_select_studio_dialog(self, title, *args):
         studio_list = self.get_ladish_controller().studio_list()
         if not studio_list:
@@ -370,11 +367,12 @@ if __name__ == "__main__":
                                                     'monitor JACK, as well as start some JACK related applications'),
                                      epilog=_('This program is part of the LADITools suite.'))
     parser.add_argument('--version', action='version', version="%(prog)s " + get_version_string())
-
     parser.parse_args()
-    GObject.threads_init()
 
+    GObject.threads_init()
     Gtk.init(None)
+
     LadiPlayer().run()
     Gtk.main()
+
     sys.exit(0)

laditools/application.py

@@ -28,5 +28,5 @@ class LadiApp(object):
     @property
     def appid(self): return self._appid
 
-    def activate(self): raise NotImplementedError
+    def run(self): raise NotImplementedError
     def quit(self): raise NotImplementedError