Fix breadcrumb Special:Browse without selected page
ERM37638
[4.5.x]
Change-Id: I9d18115ea907fa5fe06c399b2b0407ff0bfe4d30
(cherry picked from commit 540fe0783c9133b7b3d437bc4200691804ffae22)
(cherry picked from commit 36070c677a90a3a9207a234e05ce034bbcd44f3b)