[gnome-calendar] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit c3e1a377b7a3dbc196b7ac5b438cd5e252e84c00
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sat May 4 22:21:58 2019 +0200

    Update POTFILES.in

 po/POTFILES.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index ed36f056..84b8741a 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -4,6 +4,7 @@ data/appdata/org.gnome.Calendar.appdata.xml.in
 data/org.gnome.Calendar.desktop.in
 data/org.gnome.calendar.gschema.xml.in
 data/ui/alarm-row.ui
+data/ui/calendar-popover.ui
 data/ui/edit-dialog.ui
 data/ui/help-overlay.ui
 data/ui/menus.ui