/** Put the widget in single activity mode. */
private void setSingleActivityMode() {
sortPanel.setVisible(false);
titlePanel.setVisible(false);
postContent.setVisible(false);
stream.setVisible(false);
searchStatusWidget.setVisible(false);
searchBoxWidget.setVisible(false);
feedLinkWidget.setVisible(false);
sortSearchRow.setVisible(false);
EventBus.getInstance().notifyObservers(new ChangeActivityModeEvent(true));
}
