This will also be prepended to elements within this component like Panel's body will get a class x-panel-body.
This means that if you create a subclass of Panel, and you want it to get all the Panels styling for the element and the body, you leave the base Cls x-panel and use component Cls to add specific styling for this component.
This may also be specified as a config object for the Component Dragger which is instantiated to perform dragging.
For example to create a Component which may only be dragged around using a certain internal element as the drag handle, use the delegate option: The text to display in the view when there is no data to display (defaults to '').
This just allows the floating Component to seek a ZIndex Manager by examining the owner Ct chain.