userportal,webadmin: guide link opens with scrollbar

- Fixed the guide link not opening with a scrollbar causing
users not to be able to scroll the guid.

Change-Id: I006b68f2f8748f5621e86e8ffc07e33a03064bce
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=917970
Signed-off-by: Alexander Wels <awels@redhat.com>