webadmin: Fix action button regression fix

- Fixed certain situations where the previous fix failed
  to fix the visibility. The original fix didn't take into
  account the event handler that could change the visibility
  of an action button. So the original button would be visible
  then an event would make it invisible, but the flag would
  not get updated. Causing the fix to not work in certain cases.

Change-Id: Ib3c5ccb0a8732b206c94591b930fc6a01456a47d
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1058214
Signed-off-by: Alexander Wels <awels@redhat.com>