documize/gui/app/templates/components/ui-select.hbs

<select {{action 'change' on='change'}} class={{cssClass}} readonly={{readonly}}>
    {{#if prompt}}
        <option disabled selected={{is-not selection}}>
            {{prompt}}
        </option>
    {{/if}}
    {{#each content key="@identity" as |item|}}
        <option value="{{read-path item optionValuePath}}" selected={{is-equal item selection}}>
            {{read-path item optionLabelPath}}
         </option>
    {{/each}}
</select>