Slideshow: Background load all but the first slide
Slideshow: Background load all but the first slide

We add javascript to load all but the first slide in the background rather than
requiring all slides to be loaded at once.  This speeds up the starting of the slideshow, which
may be useful where this is a slow data connection.

bec-uk/bec_fault_mon,bec-uk/bec_services,bec-uk/bec_fault_mon,bec-uk/bec_fault_mon,bec-uk/bec_services,bec-uk/bec_services