userportal: fix resource tab layout

"Resources" tab on the Power User Portal unable
to display all virtual machine disks.

Change-Id: I43c9e7550384c2398893ef260d73070418a6f3c4
Bug-Url: https://bugzilla.redhat.com/1013860
Signed-off-by: Gilad Chaplik <gchaplik@redhat.com>