The OPAC view wasn't correctly restricting the display of backends when
the ILLOpacbackends preference was set.
See the test plan on comment 7
Signed-off-by: Niamh.Walker-Headon@it-tallaght.ie
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>