[zenity] Update POTFILES.in and POTFILES.skip

[Piotr Drąg <piotrdrag src gnome org>]

commit abcc873ccd0b85f10087f73a5f5bfe1a3bce1bbb
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun Nov 26 21:39:56 2017 +0100

    Update POTFILES.in and POTFILES.skip

 po/POTFILES.in   |   12 +++++++++++-
 po/POTFILES.skip |   11 ++---------
 2 files changed, 13 insertions(+), 10 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 90efb18..3488a95 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -1,9 +1,19 @@
+# List of source files containing translatable strings.
+# Please keep this file sorted alphabetically.
 src/about.c
+src/calendar.c
+src/color.c
+src/entry.c
+src/fileselection.c
+src/forms.c
 src/main.c
+src/msg.c
 src/notification.c
+src/option.c
 src/password.c
+src/progress.c
 src/scale.c
+src/text.c
 src/tree.c
 src/util.c
 src/zenity.ui
-src/option.c
diff --git a/po/POTFILES.skip b/po/POTFILES.skip
index c66bc6f..0fb3682 100644
--- a/po/POTFILES.skip
+++ b/po/POTFILES.skip
@@ -1,9 +1,2 @@
-src/calendar.c
-src/entry.c
-src/fileselection.c
-src/msg.c
-src/progress.c
-src/text.c
-src/util.h
-src/util.c
-src/zenity.h
+# List of source files that should *not* be translated.
+# Please keep this file sorted alphabetically.