edit_button.signal_clicked().connect (sigc::hide_return (sigc::bind (sigc::mem_fun (*this, &ExportFormatSelector::open_edit_dialog), false)));
remove_button.signal_clicked().connect (sigc::mem_fun (*this, &ExportFormatSelector::remove_format));
new_button.signal_clicked().connect (sigc::mem_fun (*this, &ExportFormatSelector::add_new_format));
edit_button.signal_clicked().connect (sigc::hide_return (sigc::bind (sigc::mem_fun (*this, &ExportFormatSelector::open_edit_dialog), false)));
remove_button.signal_clicked().connect (sigc::mem_fun (*this, &ExportFormatSelector::remove_format));
new_button.signal_clicked().connect (sigc::mem_fun (*this, &ExportFormatSelector::add_new_format));