Improve the Gallery's Before/After presentation to better showcase the transformations

In the Gallery, it would be nice to be able to see both the Before and After pics for each transformation at the same time.

Alternatively, when scrolling through the Gallery images without closing the zoomed-in picture view, include both Before and After pics in the sequence. At the moment, if you start on a Before pic and click the Next button, you see the next Before pic, not the After pic of what you were previously looking at. It’d be much more helpful to see Before, After, Before, After, etc., than Before, Before, Before, etc. or After, After, After, etc.