[simple-scan] Link the scan delay radio buttons

[Robert Ancell <rancell src gnome org>]

commit 7d99b7b5a6ea3aeb3687b2aece45f3af249cf33a
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue May 23 10:25:02 2017 +1200

    Link the scan delay radio buttons

 src/preferences-dialog.ui |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/preferences-dialog.ui b/src/preferences-dialog.ui
index bc974a7..9bce9de 100644
--- a/src/preferences-dialog.ui
+++ b/src/preferences-dialog.ui
@@ -369,6 +369,9 @@
                             <property name="position">4</property>
                           </packing>
                         </child>
+                        <style>
+                          <class name="linked"/>
+                        </style>
                       </object>
                       <packing>
                         <property name="left_attach">1</property>