Allow issue security level to use any custom field that implements UserCFNotificationTypeAware

panel:bgColor=e7f4fa NOTE: This suggestion is for JIRA Cloud. Using JIRA Server? See the corresponding suggestion|http://jira.atlassian.com/browse/JRASERVER-18099. panel It would be useful to be able to set the security level on an issue to include everyone who participated on an issue so if you...