ocarina: Window grabs focus on escape

Pressing the escape key will cause the window to grab focus

ocarina/window.py

@@ -21,6 +21,10 @@ window.connect("key-press-event", shortcuts.key_pressed)
 window.add(body.body)
 window.show()
 
+def grab_focus():
+	window.set_focus(None)
+shortcuts.register_shortcut("Escape", grab_focus, True)
+
 def set_title(new_title = None):
 	if new_title == None:
 		new_title = ocarina.__vers__