Bug 37277 Title Area Dialog requires navigation to the error message
2.1 it is currently not possible to navigate to an error message. Sceen reader users need to use the JAWS cursor to find the error message and continue. We should 1) Make the label navigable 2) Make the label the next element in the tab order after the next button (we may get this for free).
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/TitleAreaDialog.java
int verticalSpacing = convertVerticalDLUsToPixels(IDialogConstants.VERTICAL_SPACING);
	int horizontalSpacing = convertHorizontalDLUsToPixels(IDialogConstants.HORIZONTAL_SPACING);
	
	
	if (errorMessage == null && messageImage == null) {
		setImageLabelVisible(false);
		
		setLayoutsForNormalMessage(verticalSpacing,horizontalSpacing);
		
	} else {
		messageImageLabel.setVisible(true);
		bottomFillerLabel.setVisible(true);
		leftFillerLabel.setVisible(true);
		
		/**
		 * Note that we do not use horizontalSpacing here 
		 * as when the background of the messages changes
		 * there will be gaps between the icon label and the
		 * message that are the background color of the shell.
		 * We add a leading space elsewhere to compendate for this.
		 */
		FormData data = new FormData();
		data.left = new FormAttachment(0, H_GAP_IMAGE);
		data.top = new FormAttachment(titleLabel, verticalSpacing);
		messageImageLabel.setLayoutData(data);
		
		data = new FormData();
		data.top = new FormAttachment(messageImageLabel, 0);
		data.left = new FormAttachment(0, 0);