Lightbox test issue

[Antranig Basman]

There is a very slight init issue with the current LightboxTests.html file
in that while focus is placed onto the first item of the list with
the appropriate visual highlighting, it is somehow not in the correct
mode off the bat to be subject to CTRL-arrow dragging. I can get it there by tabbing once
but I don't see any visual confirmation of this.
Not sure whether this is "as designed" but just thought I'd mention it :)

Cheers,
A.