webadmin: Application continue polling after logout

- Fixed queries to BookMarks not stopping when logging out.
- Fixed queries to RoleListModel not stopping when logging out.
- Fixed queries to SystemPermissionListModel not stopping
when logging out.

Change-Id: Ibd2718649ab4031e6ff2b0d0e6c449f53164ff9f
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=888492
Signed-off-by: Alexander Wels <awels@redhat.com>