[gnome-calendar] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit 31de3bbe35260f9300e10aa0662f7ec35e3cc249
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Thu Nov 16 00:59:35 2017 +0100

    Update POTFILES.in

 po/POTFILES.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 1e32062..8554fce 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -7,6 +7,7 @@ data/ui/alarm-row.ui
 data/ui/edit-dialog.ui
 data/ui/help-overlay.ui
 data/ui/menus.ui
+data/ui/month-popover.ui
 data/ui/month-view.ui
 data/ui/quick-add-popover.ui
 data/ui/search-view.ui