[gnome-boxes] Properties: Fix back button name

[Alexander Larsson <alexl src gnome org>]

commit 4dfa74930342fc49113676174cba3bb7a4074988
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Oct 31 13:44:03 2012 +0100

    Properties: Fix back button name
    
    Don't use name on back button if it goes to the collection view
    rather than to the named display.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=677714

 src/properties.vala |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/src/properties.vala b/src/properties.vala
index ed4ead1..04c2306 100644
--- a/src/properties.vala
+++ b/src/properties.vala
@@ -290,7 +290,11 @@ private class Boxes.Properties: Boxes.UI {
 
         switch (ui_state) {
         case UIState.PROPERTIES:
-            toolbar_label_bind = App.app.current_item.bind_property ("name", toolbar_label, "label", BindingFlags.SYNC_CREATE);
+            toolbar_label_bind = null;
+            if (previous_ui_state != UIState.COLLECTION)
+                toolbar_label_bind = App.app.current_item.bind_property ("name", toolbar_label, "label", BindingFlags.SYNC_CREATE);
+            else
+                toolbar_label.label = "";
             populate ();
             opacity = 255;
             break;