Bug 86456 [Dialogs] Dialogs open on wrong monitor
bundles/org.eclipse.jface/src/org/eclipse/jface/window/Window.java
/**
	 * Closes this window, disposes its shell, and removes this window from its
	 * window manager (if it has one).
	 * <p>
	 * This framework method may be extended (<code>super.close</code> must
	 * be called).
	 * </p>
	 * 
	 * @return <code>true</code> if the window is (or was already) closed, and
	 *         <code>false</code> if it is still open
	 */
	public boolean close() {
		if (shell == null || shell.isDisposed())
			return true;
		
		if (fontChangeListener != null) {
			JFaceResources.getFontRegistry().removeListener(fontChangeListener);
			fontChangeListener = null;
		}
		
		
		
		shell.dispose();
		shell = null;
		contents = null;
		if (windowManager != null) {
			windowManager.remove(this);
			windowManager = null;
		}
		return true;