Fixed saving of multiview screenshots

Prior to this fix, views in multiview screenshots that were smaller
than the current window multiview size where not saved in the correct
locations and the image was not scaled correctly.

Change-Id: I5b08f71ec1d435f2457274628d54443098baed6c
Merge topic 'lookup_table_cleanup' into next

ece2e862 Fixed saving of multiview screenshots