plus-ui/public/static/flowable-modeler/editor-app/configuration/properties/escalation-property-write-template.html

<div ng-controller="FlowableEscalationRefCtrl">
    <select ng-model="property.value" ng-change="escalationChanged()" ng-options="escalationDefinition.id as (escalationDefinition.name + ' (' + escalationDefinition.id + ')') for escalationDefinition in escalationDefinitions">
    </select>
</div>