Log Message:
Update to 1.8.1:

* Correct reporting of visibility of items on GnomeCanvas. (bug #156143)
* Do not activate menu item when selectinit it. (bug #156164)
* Set cells as selectable. (bug 153638)
* Fix error when tab ir removed from GtkNotebook. (bug #159206)
* Fix crasher when GtkTreeView is changed immediately after row is expanded.
  (bug #132551)
* Add translation: Galician [Jesus Bravo Alvarez]
* Updated translations: Canadian English [Adam Weinberger], Persian [Meelad
  Zakaria]