[zenity] help: Add missing screenshot to Makefile

[Piotr Drąg <piotrdrag src gnome org>]

commit 7101d9743cd07e853f289ea6ebb19222f0333f7f
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Nov 26 05:06:54 2017 +0100

    help: Add missing screenshot to Makefile

 help/Makefile.am |   29 +++++++++++++++--------------
 1 files changed, 15 insertions(+), 14 deletions(-)
---
diff --git a/help/Makefile.am b/help/Makefile.am
index eca0e99..c48c920 100644
--- a/help/Makefile.am
+++ b/help/Makefile.am
@@ -3,20 +3,21 @@
 HELP_ID = zenity
 
 HELP_MEDIA = \
-       figures/zenity-calendar-screenshot.png          \
-       figures/zenity-colorselection-screenshot.png    \
-       figures/zenity-entry-screenshot.png             \
-       figures/zenity-error-screenshot.png             \
-       figures/zenity-fileselection-screenshot.png     \
-       figures/zenity-forms-screenshot.png             \
-       figures/zenity-information-screenshot.png       \
-       figures/zenity-list-screenshot.png              \
-       figures/zenity-notification-screenshot.png      \
-       figures/zenity-password-screenshot.png          \
-       figures/zenity-progress-screenshot.png          \
-       figures/zenity-scale-screenshot.png             \
-       figures/zenity-question-screenshot.png          \
-       figures/zenity-text-screenshot.png              \
+       figures/zenity-calendar-screenshot.png                  \
+       figures/zenity-colorselection-screenshot.png            \
+       figures/zenity-entry-screenshot.png                     \
+       figures/zenity-error-screenshot.png                     \
+       figures/zenity-fileselection-screenshot.png             \
+       figures/zenity-forms-screenshot.png                     \
+       figures/zenity-information-screenshot.png               \
+       figures/zenity-list-screenshot.png                      \
+       figures/zenity-notification-listen-screenshot.png       \
+       figures/zenity-notification-screenshot.png              \
+       figures/zenity-password-screenshot.png                  \
+       figures/zenity-progress-screenshot.png                  \
+       figures/zenity-question-screenshot.png                  \
+       figures/zenity-scale-screenshot.png                     \
+       figures/zenity-text-screenshot.png                      \
        figures/zenity-warning-screenshot.png
 
 HELP_FILES = \