In the parent task it was implemented, that the JS reacts on the last/first image.
The div class changes from 'prev' to 'prev disables'.

So the css could react on it, now the question from parent task remains and should be decided:

In stk it should be decided, if the CSS should react and how.
Possibilities is see, but Aperto has to define if this is possible, makes sense:

• When only one image is shown, no next/prev arrows are shown at all.
• When no next or prev is available, probably the arrow and the 'prevoius' could be replaced by a transparent image with the same size.
  Like this the arrow would not be visible anymore. But i could imagine, that this is not possible in a proper way, that it looks fine.
• Could be left as it is.