[gnome-builder] prefs: add transfers button to preferences

[Christian Hergert <chergert src gnome org>]

commit 24ab7db5fbbd44f32c35b33efc505823fe449db1
Author: Christian Hergert <chergert redhat com>
Date:   Mon Sep 25 22:28:46 2017 -0700

    prefs: add transfers button to preferences
    
    We need this when the preferences is the only view-able window.

 src/libide/preferences/ide-preferences-window.ui |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/src/libide/preferences/ide-preferences-window.ui 
b/src/libide/preferences/ide-preferences-window.ui
index 4d926b2..e2bad0b 100644
--- a/src/libide/preferences/ide-preferences-window.ui
+++ b/src/libide/preferences/ide-preferences-window.ui
@@ -1,6 +1,19 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <interface>
   <template class="IdePreferencesWindow" parent="GtkWindow">
+    <child type="titlebar">
+      <object class="GtkHeaderBar" id="header_bar">
+        <property name="title" translatable="yes">Preferences</property>
+        <property name="show-close-button">true</property>
+        <property name="visible">true</property>
+        <child>
+          <object class="IdeTransfersButton"/>
+          <packing>
+            <property name="pack-type">end</property>
+          </packing>
+        </child>
+      </object>
+    </child>
     <child>
       <object class="IdePreferencesPerspective" id="perspective">
         <property name="visible">true</property>