Classes
 ClassDescription
 AutoSizeButton AutoSizeButton extends Button and create a button that sizes itself based on the size of its label and fires a change event when the button is resized.
 ButtonBar ButtonBar extends UIComponent and builds one or multiple rows of AutoSizeButton instances depending on the dimensions of its parent container and the size of the buttons
 DialogBox DialogBox extends UIComponent and builds an AlertBox by assembling a TitleBar, MessageBox and ButtonBar
 MessageBox MessageBox extends UIComponent and creates a text field based on minimum and maximum widths<
 TitleBar TitleBar extends Label, adding a background.