// The top-level, all-setting, countent source radio button
List harvestSource = main.addList("harvestSource", "form");
harvestSource.addLabel(T_label_source);
Radio source = harvestSource.addItem().addRadio("source");
source.addOption(hc == null, "source_normal", T_source_normal);
source.addOption(hc != null, "source_harvested", T_source_harvested);
List settings = main.addList("harvestSettings", "form");