* @extends Ext.panel.Panel
* <p>A specialized panel intended for use as an application window. Windows are floated, {@link #resizable}, and
* {@link #draggable} by default. Windows can be {@link #maximizable maximized} to fill the viewport,
* @extends Ext.panel.Panel
* <p>A specialized panel intended for use as an application window. Windows are floated, {@link #resizable}, and
* {@link #draggable} by default. Windows can be {@link #maximizable maximized} to fill the viewport,