userportal,webadmin: preserve grid scroll

- Fixed issue where manually pressing refresh button
  would cause the scroll of the grid to reset.

Change-Id: Ia6affc48b93968a77329590bd15f13d0735c70a1
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1046279
Signed-off-by: Alexander Wels <awels@redhat.com>