Resolves: tdf#120612 help response missing

Change-Id: I096bdcc93899dfd41d88cb9d00d54c51cebeca92
Reviewed-on: https://gerrit.libreoffice.org/61824
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

sfx2/uiconfig/ui/linkeditdialog.ui

@@ -198,6 +198,7 @@
     <action-widgets>
       <action-widget response="-5">ok</action-widget>
       <action-widget response="-6">cancel</action-widget>
+      <action-widget response="-11">help</action-widget>
     </action-widgets>
     <child>
       <placeholder/>