[gnome-system-monitor] Fixed padding issue on Processes tab (bgo#761124)

[Robert Roth <robertroth src gnome org>]

commit 60ce826dafdee1889c723a6d77cd401f4ab65831
Author: Robert Roth <robert roth off gmail com>
Date:   Wed Feb 3 19:14:47 2016 +0200

    Fixed padding issue on Processes tab (bgo#761124)

 data/interface.ui |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/data/interface.ui b/data/interface.ui
index fefe5f0..13bb7e7 100644
--- a/data/interface.ui
+++ b/data/interface.ui
@@ -29,7 +29,7 @@
             <property name="halign">end</property>
             <property name="direction">none</property>
             <style>
-              <class name="image-button"/>
+              <class name="title-button"/>
             </style>
           </object>
           <packing>
@@ -45,7 +45,7 @@
             <property name="action_name">win.search</property>
             <property name="action_target">@b false</property>
             <style>
-              <class name="image-button"/>
+              <class name="title-button"/>
             </style>
             <child>
               <object class="GtkImage" id="search_image">