[gitg] Use the new support for RTL icons in GtkIconTheme

[Yosef Or Boczko <yoseforb src gnome org>]

commit f528deeab6be2c9d04da89ac04c7265234a1b72d
Author: Yosef Or Boczko <yoseforb src gnome org>
Date:   Thu Jun 26 00:43:18 2014 +0300

    Use the new support for RTL icons in GtkIconTheme
    
    In the new GTK+ (from 3.13.2).

 gitg/gitg-window.vala            |    7 ++-----
 gitg/resources/ui/gitg-window.ui |    1 +
 2 files changed, 3 insertions(+), 5 deletions(-)
---
diff --git a/gitg/gitg-window.vala b/gitg/gitg-window.vala
index e26a51f..6a4ec3e 100644
--- a/gitg/gitg-window.vala
+++ b/gitg/gitg-window.vala
@@ -163,14 +163,11 @@ public class Window : Gtk.ApplicationWindow, GitgExt.Application, Initable
                        d_environment[e] = Environment.get_variable(e);
                }
 
-               if (get_direction () == Gtk.TextDirection.RTL)
+               if (Gtk.check_version(3, 13, 2) != null &&
+                   get_direction () == Gtk.TextDirection.RTL)
                {
                        dash_image.icon_name = "go-previous-rtl-symbolic";
                }
-               else
-               {
-                       dash_image.icon_name = "go-previous-symbolic";
-               }
 
                d_header_bar.remove(d_activities_switcher);
                d_header_bar.remove(d_search_button);
diff --git a/gitg/resources/ui/gitg-window.ui b/gitg/resources/ui/gitg-window.ui
index 4de9915..60e87ed 100644
--- a/gitg/resources/ui/gitg-window.ui
+++ b/gitg/resources/ui/gitg-window.ui
@@ -27,6 +27,7 @@
             <child>
               <object class="GtkImage" id="dash_image">
                 <property name="visible">True</property>
+                <property name="icon_name">go-previous-symbolic</property>
                 <property name="icon_size">1</property>
               </object>
             </child>