Sets a custom title for the GtkHeaderBar. The title should help a
user identify the current view. This supercedes any title set by
gtk_header_bar_set_title() or gtk_header_bar_set_subtitle().
You should set the custom title to NULL, for the header title label
to be visible again.
Sets a custom title for the GtkHeaderBar. The title should help a user identify the current view. This supercedes any title set by gtk_header_bar_set_title() or gtk_header_bar_set_subtitle(). You should set the custom title to NULL, for the header title label to be visible again.