This modifies an implicit divide by int which has the effect of rounding
and causing center to be offset when there are an odd number of photos
beign shown.

This update modifies the library so that it doesn't enqueue multiple
messages of the same type which can keep showing to the user long after
no longer being relevant.

                    _....----"""----...._
                 .-'  o    o    o    o   '-.
                /  o    o    o         o    \
               /     o      o   o     o    o \
             _|   o   o    o      o  o     o  |_
            / `''-----.................-----''` \
            \___________________________________/
              \~`-`.__.`-~`._.~`-`~.-~.__.~`-`/
           jgs \                             /
                `-._______________________.-'

    From small things, momma, big things one day come.

8""""8
8      eeeee eeee eeeee e   e  e eeeee eeeee  eeee
8eeeee 8  88 8      8   8   8  8 8   8 8   8  8
    88 8   8 8eee   8e  8e  8  8 8eee8 8eee8e 8eee
e   88 8   8 88     88  88  8  8 88  8 88   8 88
8eee88 8eee8 88     88  88ee8ee8 88  8 88   8 88ee