Bug 131771 Match animated message behaviour in Preferences
An enhancement should be made to Preferences so that warnings and errors show up in a sliding message area like it they do in TitleAreaDialog.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/TitleAreaDialog.java
}
    
	/**
	 * Sets whether the message area should appear or dissapear
	 * 
	 * @param visible
	 * 			<code>true</code> if the message area should be 
	 * 			displayed, and <code>false</code> otherwise.
	 */
	private void setMessageAreaVisible(boolean visible) {
		
		
		 
		switch (Policy.getAnimator().getAnimationState()) {
		case ControlAnimator.OPENING:
		case ControlAnimator.OPEN:
			if (visible)
				return;
			break;
		case ControlAnimator.CLOSING:
		case ControlAnimator.CLOSED:
			if (!visible){
				return;
			}
			break;
		}
		
        FormData messageAreaData = new FormData();
        messageAreaData.right = new FormAttachment(titleImage);
        messageAreaData.left = new FormAttachment(leftFillerLabel);