MarkNamedMenuItem
MarkNamedMenuItem(menu, kIconMode, viewMode == kIconMode);
MarkNamedMenuItem(menu, kListMode, viewMode == kListMode);
MarkNamedMenuItem(menu, kMiniIconMode, viewMode == kMiniIconMode);
MarkNamedMenuItem(fSearchModeMenu, InitialMode(node), true);
extern void MarkNamedMenuItem(BMenu* menu, const char* itemName, bool on);
extern void MarkNamedMenuItem(BMenu* menu, uint32 commandName, bool on);