[glade] GladePreferences: mark string as translatable

[Juan Pablo Ugarte <jpu src gnome org>]

commit 01956c4de7a89c7d512c340e7d3328f4485659a7
Author: Juan Pablo Ugarte <juanpablougarte gmail com>
Date:   Fri Aug 21 18:38:08 2020 -0300

    GladePreferences: mark string as translatable
    
    Mark file chooser dialog title as translatable

 src/glade-preferences.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/glade-preferences.c b/src/glade-preferences.c
index 0c1fbf46..a4de6bf7 100644
--- a/src/glade-preferences.c
+++ b/src/glade-preferences.c
@@ -231,7 +231,7 @@ on_add_catalog_button_clicked (GtkButton *button, GladePreferences *preferences)
   GladePreferencesPrivate *priv = preferences->priv;
   GtkWidget *dialog;
 
-  dialog = gtk_file_chooser_dialog_new ("Select a catalog search path",
+  dialog = gtk_file_chooser_dialog_new (_("Select a catalog search path"),
                                         GTK_WINDOW (preferences),
                                         GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER,
                                         _("_Cancel"),