Fixed undefined method `each' for nil:NilClass error on retirement tab
Fixed undefined method `each' for nil:NilClass error on retirement tab

Now that retirement hash is returned with remove_resources value, had to add checks around extra_vars loops to fix undefined method `each' for nil:NilClass error. And also only show Dialog name/link if dialog was selected on retirement tab.

ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic,ManageIQ/manageiq-ui-classic