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
* @return the top level control, or <code>null</code> if this window's
 *   control has not been created yet
 */
protected Control getContents() {
	return contents;
}
/**
 * Returns the default image. This is the image that will
 * be used for windows that have no shell image at the time they
 * are opened. There is no default image unless one is
 * installed via <code>setDefaultImage</code>.
 *
 * @return the default  image, or <code>null</code> if none
 * @see #setDefaultImage
 */
public static Image getDefaultImage() {
	return (defaultImages == null || defaultImages.length < 1)
			? null
			: defaultImages[0];
}
/**
 * Returns the array of default images to use for newly opened windows.
 * It is expected that the array will contain the same icon rendered at
 * different resolutions.
 * 
 * @see org.eclipse.swt.widgets.Decorations#setImages
 * 
 * @return the array of images to be used when a new window is opened
 * @see #setDefaultImages
 * @since 3.0