Fix selectivity nuxeo-document-suggestion at initialization

nuxeo-document-suggestion.html:247 Uncaught TypeError: this.urlFor is not a function
    at HTMLElement._selectionFormatter (nuxeo-document-suggestion.html:247)
    at HTMLElement.<anonymous> (nuxeo-selectivity.html:595)
    at MultipleInput.template (selectivity.js:5657)
    at MultipleInput._renderSelectedItem (selectivity.js:3318)
    at Array.forEach (<anonymous>)
    at MultipleInput.rerenderSelection (selectivity.js:3085)
    at HTMLElement._valueChanged (nuxeo-selectivity.html:712)
    at HTMLElement.attached (nuxeo-selectivity.html:638)
    at HTMLElement.attached (class.html:225)
    at HTMLElement.connectedCallback (legacy-element-mixin.html:100)