[glade] GladePreviewer: Update window title with (unnamed) if need be

[Tristan Van Berkom <tvb src gnome org>]

commit 81920d56168a8148b74905f2e8e323922148c6e8
Author: Tristan Van Berkom <tristan vanberkom codethink co uk>
Date:   Fri Jan 29 15:10:47 2016 +0100

    GladePreviewer: Update window title with (unnamed) if need be

 gladeui/glade-previewer.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/gladeui/glade-previewer.c b/gladeui/glade-previewer.c
index 4fad19b..44a2357 100644
--- a/gladeui/glade-previewer.c
+++ b/gladeui/glade-previewer.c
@@ -214,6 +214,9 @@ glade_previewer_window_set_title (GtkWindow *window,
                                   gchar *toplevel)
 {
   gchar *title, *pretty_path = NULL;
+  const gchar *widget_name = toplevel;
+  if (widget_name && g_str_has_prefix (widget_name, GLADE_UNNAMED_PREFIX))
+    widget_name = _("(unnamed)");
 
   if (filename && g_path_is_absolute (filename))
     {
@@ -225,13 +228,13 @@ glade_previewer_window_set_title (GtkWindow *window,
   if (filename)
     {
       if (toplevel)
-        title = g_strdup_printf (_("Previewing %s (%s)"), filename, toplevel);
+        title = g_strdup_printf (_("Previewing %s - %s"), filename, widget_name);
       else
         title = g_strdup_printf (_("Previewing %s"), filename);
     }
   else if (toplevel)
     {
-      title = g_strdup_printf (_("Previewing %s"), toplevel);
+      title = g_strdup_printf (_("Previewing %s"), widget_name);
     }
   else
     {