[gnome-subtitles] Update POTFILES.in

[Piotr Drąg <piotrdrag src gnome org>]

commit aa8cb8c2cd0f5ef2ebb57a887daae726f8d27964
Author: Piotr Drąg <piotrdrag gmail com>
Date:   Sun May 16 11:42:59 2021 +0200

    Update POTFILES.in

 po/POTFILES.in | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/po/POTFILES.in b/po/POTFILES.in
index 2811219..eead275 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -1,9 +1,9 @@
 # List of source files containing translatable strings.
 # Please keep this file sorted alphabetically.
-[encoding: UTF-8]
 data/org.gnome.GnomeSubtitles.appdata.xml.in
 data/org.gnome.GnomeSubtitles.desktop.in.in
 data/org.gnome.GnomeSubtitles.gschema.xml
+src/External/GstBackend/GstBackend.cs
 [type: gettext/glade]src/Glade/MainWindow.ui
 src/GnomeSubtitles/Core/Command/AdjustTimingsCommand.cs
 src/GnomeSubtitles/Core/Command/ChangeFrameRateCommand.cs
@@ -35,11 +35,10 @@ src/GnomeSubtitles/Dialog/FileSaveDialog.cs
 src/GnomeSubtitles/Dialog/FileTranslationOpenDialog.cs
 src/GnomeSubtitles/Dialog/FileTranslationSaveDialog.cs
 src/GnomeSubtitles/Dialog/Message/ErrorDialog.cs
-src/GnomeSubtitles/Dialog/Message/FileOpenErrorDialog.cs
 src/GnomeSubtitles/Dialog/Message/FileSaveErrorDialog.cs
 src/GnomeSubtitles/Dialog/Message/SaveConfirmationDialog.cs
 src/GnomeSubtitles/Dialog/Message/SubtitleFileOpenErrorDialog.cs
-src/GnomeSubtitles/Dialog/Message/VideoErrorDialog.cs
+src/GnomeSubtitles/Dialog/Message/VideoFileOpenErrorDialog.cs
 src/GnomeSubtitles/Dialog/PreferencesDialog.cs
 src/GnomeSubtitles/Dialog/SearchDialog.cs
 src/GnomeSubtitles/Dialog/SetLanguagesDialog.cs
@@ -53,5 +52,6 @@ src/GnomeSubtitles/Ui/Component/EncodingComboBox.cs
 src/GnomeSubtitles/Ui/Component/NewlineTypeComboBox.cs
 src/GnomeSubtitles/Ui/Menus.cs
 src/GnomeSubtitles/Ui/Status.cs
+src/GnomeSubtitles/Ui/VideoPreview/Video.cs
 src/GnomeSubtitles/Ui/VideoPreview/VideoPosition.cs
 src/GnomeSubtitles/Ui/View/SubtitleView.cs