private static final long serialVersionUID = 4671029090794820300L;
public HistoryPanel(PictureChat pictureChat) {
chat = pictureChat;
actions = new ActionPriorityStack();
currentPicture = new PicturesContent();
panelList = new ArrayList<OneHistoryPicturePanel>();
mainPanel = new JPanel();
mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS));