StageStep
progress->StageStep(1, B_TRANSLATE("Preparing package"));
progress->StageStep(1, B_TRANSLATE("Installing files and folders"));
progress->StageStep(1, NULL, get_item_progress_string(i, n).String());
progress->StageStep(1, B_TRANSLATE("Running post-installation scripts"),
progress->StageStep(1, NULL, get_item_progress_string(i, m).String());
progress->StageStep(1, B_TRANSLATE("Finishing installation"), "");
progress->StageStep(1, B_TRANSLATE("Done"));
void StageStep(uint32 count, const char *text = NULL,