[gnome-tweak-tool] Fix the location of the buttons in the headerbar when is split

[John Stowers <jstowers src gnome org>]

commit 01144e4d9cd27714768a488dc68ee4d56b1f6b67
Author: Yosef Or Boczko <yoseforb gmail com>
Date:   Sun Jan 12 02:37:43 2014 +0200

    Fix the location of the buttons in the headerbar when is split
    
    https://bugzilla.gnome.org/show_bug.cgi?id=722017

 gtweak/tweakview.py |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gtweak/tweakview.py b/gtweak/tweakview.py
index 6bac53f..10069b7 100644
--- a/gtweak/tweakview.py
+++ b/gtweak/tweakview.py
@@ -61,6 +61,7 @@ class Window(Gtk.ApplicationWindow):
         header = Gtk.Box()
 
         left_header = Gtk.HeaderBar()
+        left_header.props.show_close_button = True
         right_header = Gtk.HeaderBar()
         right_header.props.show_close_button = True
 
@@ -69,6 +70,12 @@ class Window(Gtk.ApplicationWindow):
         right_header.get_style_context().add_class("titlebar")
         right_header.get_style_context().add_class("tweak-titlebar-right")
 
+        layout_desc = Gtk.Settings.get_default().props.gtk_decoration_layout;
+        tokens = layout_desc.split(":", 2)
+        if tokens != None:
+                right_header.props.decoration_layout = ":" + tokens[1]
+                left_header.props.decoration_layout = tokens[0]
+
         self.title = Gtk.Label("")
         self.title.get_style_context().add_class("title")
         right_header.set_custom_title(self.title)