Bug 58095 [Preferences] Selecting pref page moved dialog to other screen
When I move the preferences dialog to my secondary screen and change a prefpage, the entire dialog moves back to my primary screen and "hugs" the right border of the main screen.
bundles/org.eclipse.jface/src/org/eclipse/jface/window/Window.java
* getLayout() to return null. 
 * 
 * <p>It is common practise to create and return a single composite that
 * contains the entire window contents.</p>   
 * 
 * <p>
 * The default implementation of this framework method
 * creates an instance of <code>Composite</code>.
 * Subclasses may override.
 * </p>
 * 
 * @param parent the parent composite for the controls in
 * this window. The type of layout used is determined by getLayout()
 * 
 * @return the control that will be returned by subsequent calls to
 * getControl()
 */
protected Control createContents(Composite parent) {
	 
	return new Composite(parent, SWT.NONE);
}
/**
 * Creates and returns this window's shell.
 * <p>
 * The default implementation of this framework method creates
 * a new shell and configures it using <code/>configureShell</code>. Rather 
 * than override this method, subclasses should instead override 
 * <code/>configureShell</code>.
 * </p>
 *