[gtk+/gtk-3-22] widget-factory: Use :relief=none, not class .flat

[Daniel Boles <dboles src gnome org>]

commit 16e23bebe389c59599fa8e00a3caae6c99b7ee9b
Author: Daniel Boles <dboles src gnome org>
Date:   Sat May 13 21:55:28 2017 +0100

    widget-factory: Use :relief=none, not class .flat
    
    The rest of the ui file follows that convention.

 demos/widget-factory/widget-factory.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/demos/widget-factory/widget-factory.ui b/demos/widget-factory/widget-factory.ui
index 300ecf6..5e57e72 100644
--- a/demos/widget-factory/widget-factory.ui
+++ b/demos/widget-factory/widget-factory.ui
@@ -3750,6 +3750,7 @@ microphone-sensitivity-medium-symbolic</property>
                             <property name="visible">1</property>
                             <property name="valign">center</property>
                             <property name="popover">notebook_info_popover</property>
+                            <property name="relief">none</property>
                             <child>
                               <object class="GtkImage">
                                 <property name="visible">1</property>
@@ -3760,7 +3761,6 @@ microphone-sensitivity-medium-symbolic</property>
                             <style>
                               <class name="image-button"/>
                               <class name="circular"/>
-                              <class name="flat"/>
                             </style>
                           </object>
                         </child>