RasterControl.setFixed( isFixed )
Indicates if the control is placed using fixed or default positioning. When
fixed is used the control keeps its place relative to the browser window and
does not scroll with the document.
True indicates the control is positioned relative to
the window, and does not scroll with its parent content.
cleals the control's position attribute allowing its inherited
CSS position value to take over (if any).
The control object. This allow for chaining multiple setter methods in
one single statement.