[gtk+] GtkScaleButton: Add a style class to the scale button popover

[Matthias Clasen <matthiasc src gnome org>]

commit 88a86fa044d50491d51274d8baa462ef1f4b89be
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Jul 8 10:44:30 2014 -0400

    GtkScaleButton: Add a style class to the scale button popover
    
    Set the .scale-popup style class on the popover of scale buttons.
    This lets us select the +/- buttons and style them appropriately.

 gtk/resources/ui/gtkscalebutton.ui |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/resources/ui/gtkscalebutton.ui b/gtk/resources/ui/gtkscalebutton.ui
index f64ebd8..c48c052 100644
--- a/gtk/resources/ui/gtkscalebutton.ui
+++ b/gtk/resources/ui/gtkscalebutton.ui
@@ -23,6 +23,9 @@
   </object>
   <object class="GtkPopover" id="dock">
     <signal name="map" handler="cb_popup_mapped" swapped="no"/>
+    <style>
+      <class name="scale-popup"/>
+    </style>
     <child>
       <object class="GtkBox" id="box">
         <property name="visible">True</property>