[glade] Marked property name for translation

[Marek Černocký <mcernocky src gnome org>]

commit c49d70175138140d5ce71889b5ec00c00fed9d4e
Author: Marek Černocký <marek manet cz>
Date:   Sun Sep 17 08:20:43 2017 +0200

    Marked property name for translation

 plugins/gtk+/gtk+.xml.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/gtk+/gtk+.xml.in b/plugins/gtk+/gtk+.xml.in
index 10bc351..5eb2c47 100644
--- a/plugins/gtk+/gtk+.xml.in
+++ b/plugins/gtk+/gtk+.xml.in
@@ -751,7 +751,7 @@
         
         <properties> 
           <!-- Virtual accel-groups property to record accel groups -->
-          <property id="accel-groups" name="Accel Groups" ignore="True" since="2.16" save="False" 
weight="0.5" custom-layout="True">
+          <property id="accel-groups" _name="Accel Groups" ignore="True" since="2.16" save="False" 
weight="0.5" custom-layout="True">
             <parameter-spec>
               <type>GladeParamObjects</type>
               <value-type>GtkAccelGroup</value-type>