webadmin: grids jump to last selected entity

- Fixed grids jumping to last selected entity on refresh.

Change-Id: I0f34a369ba1074456614ad65b7e4cc77af963853
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=882618
Signed-off-by: Alexander Wels <awels@redhat.com>