[gnome-control-center] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit ab0370c4bbefce36dc0433e90585c32ae919f12b
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Tue Feb 26 20:50:57 2019 +0100

    Update POTFILES.in

 po/POTFILES.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 5de542cf5..1d8b48beb 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -36,6 +36,7 @@ panels/datetime/ydm.ui
 panels/display/cc-display-panel.c
 panels/display/cc-display-panel.ui
 panels/display/cc-display-settings.c
+panels/display/cc-display-settings.ui
 panels/display/cc-night-light-dialog.ui
 panels/display/gnome-display-panel.desktop.in.in
 panels/info/cc-info-default-apps-panel.ui