CLOUDSTACK-747: UI - Internal LB detailView - Assigned VMs tab - Assign VMs action - exclude assigned VMs from custom listView dialog.
CLOUDSTACK-747: UI - Internal LB detailView - remove AssignVM action in Details Tab (which has been replaced with the one in Assigned VMs tab).
CLOUDSTACK-747: Internal LB detailView - Assigned VMs tab - Assign VMs action - trigger a refresh for the listView after action is finished.