Is there a way to have the NAVIGATION BUTTONS dim and not be able to be selected when the slide is set to “PLAY”? This really comes into play when I have multiple slides in a row set to PLAY. The tendency is to hold your finger over the navigation button and keep pushing if you think the slide is done. If you push at the end of a slide and the next is set to Play, then it skips the slide and then the person has to backup and it gets all messed up.