Revert "Adapt autotest to new expected "Space" key behaviour"

This reverts commit df5cf6fe.

The autotest was orginally changed to adapt to new behaviour when
the Space key is pressed. This change used to be implemented in
KItemListController which meant that the KItemListControllerTest
needed changing, but this is no longer the case.
Instead the new behaviour when the Space key is pressed is now
implemented further up the hierarchy, so the KItemListController
change could be reverted in
7b6a67e5 and as such we can also
revert this autotest change.