[gnome-control-center] Add support for multiple file selection

[Robert Ancell <rancell src gnome org>]

commit 3ca850b257f9f21b3b7328dcdc1ad92a7bcc9f12
Author: grumpey <grumpey0 gmail com>
Date:   Sat Jun 18 07:29:13 2022 -0400

    Add support for multiple file selection
    
    fix formatting

 panels/background/cc-background-chooser.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/panels/background/cc-background-chooser.c b/panels/background/cc-background-chooser.c
index 11b53088b..8d24e4535 100644
--- a/panels/background/cc-background-chooser.c
+++ b/panels/background/cc-background-chooser.c
@@ -320,6 +320,7 @@ cc_background_chooser_select_file (CcBackgroundChooser *self)
   filter = gtk_file_filter_new ();
   gtk_file_filter_add_pixbuf_formats (filter);
   gtk_file_chooser_set_filter (GTK_FILE_CHOOSER (filechooser), filter);
+  gtk_file_chooser_set_select_multiple (GTK_FILE_CHOOSER (filechooser), TRUE);
 
   pictures_folder = g_file_new_for_path (g_get_user_special_dir (G_USER_DIRECTORY_PICTURES));
   gtk_file_chooser_set_current_folder (GTK_FILE_CHOOSER (filechooser),