CRM-13966 - Fix entityRef/getlist to work with non-id keys
CRM-13966 - Migrate event type to select2
CRM-13966 - Migrate event id to select2
CRM-13966 - Improve select2 description formatting
CRM-13966 - Allow extra data to be returned with autocomplete results
CRM-14270 - Fix UX & performance issues on backend participant form
Cleanup Participant.tpl
Merge pull request #2558 from colemanw/eventSelect2

Select2 work