webadmin: Selecting provider does not update content

Alternative patchset.

Change-Id: If024e6730521efba5d9ef67a71f527d3456e91ac
Bug-Url: https://bugzilla.redhat.com/1165208
Signed-off-by: Alexander Wels <awels@redhat.com>
Signed-off-by: Vojtech Szocs <vszocs@redhat.com>