Bug lightbox : navigate through album with arrow

Original github ticket #432

Hi, when navigate through the album in lightbox mode, when key (left/right) is push before the next content is loaded, it load the next content below the first one. So there is 2 or more lightbox opened on the same page. Hope my explaination is clear. Thanks for all of your work.

@capobianco.brice - Thanks for pointing this out. We are having a look into this.