[pitivi] tabsmanager: Fix utility windows' shifting behaviour

[Jean-François Fortin Tam <jfft src gnome org>]

commit 6e894d8e70782e26162ea2a236a20db41bbe7fb6
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Tue Mar 18 12:34:18 2014 -0300

    tabsmanager: Fix utility windows' shifting behaviour
    
    When using event.x/y, the saved values would be the internal window's position.
    To save the general window position, window.get_position() was used.
    
    Fixes bug #692980

 pitivi/tabsmanager.py |    7 ++++---
 1 files changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/pitivi/tabsmanager.py b/pitivi/tabsmanager.py
index 08312d2..bcf5a10 100644
--- a/pitivi/tabsmanager.py
+++ b/pitivi/tabsmanager.py
@@ -116,17 +116,18 @@ class BaseTabs(Gtk.Notebook):
         else:
             return notebook
 
-    def _detachedComponentWindowConfiguredCb(self, unused_window, event, child_name):
+    def _detachedComponentWindowConfiguredCb(self, window, event, child_name):
         """
         When the user configures the detached window
         (changes its size, position, etc.), save the settings.
 
         The config key's name depends on the name (label) of the tab widget.
         """
+        position = window.get_position()
         setattr(self.settings, child_name + "width", event.width)
         setattr(self.settings, child_name + "height", event.height)
-        setattr(self.settings, child_name + "x", event.x)
-        setattr(self.settings, child_name + "y", event.y)
+        setattr(self.settings, child_name + "x", position[0])
+        setattr(self.settings, child_name + "y", position[1])
 
     def _createDefaultConfig(self, child_name):
         """