itsm-pc-handle/assets/views/customform/tpl/ui-multi-select-tree.html

<multi-select-tree 
id="selectTree"
    ng-model="model[options.key]" 
    ng-value="to.translate"
    data-input-model="to.options"
    ng-change="to['onChange'](model[options.key], options, this, $event ,model);" 
    data-output-model="model[options.key]"
    theme="bootstrap" ng-required="{{to.required}}"
    data-startCollapsed="true"
    ng-disabled="{{to.disabled}}"
    multi-select="to.isMultiSelect"
    data-default-label="{{to.placeholder || ''}}"
    data-refresh="to['refresh'](items)"
    data-refresh-delay="{{to.refreshDelay}}"
    data-callback="to['onDataCallback'](item, selectItems, options, this ,model)"
    data-select-only-leafs="to.selLeafs"
    data-trans-label="{{ to['labelProp'] || 'name' }}"
    data-switch-view="false">
</multi-select-tree>
<style>
    .tree-control .tree-view {
        z-index: 99999;
        max-height: 200px;
    }
    .noSearchInput .tree-view .helper-container{
        display: none;
    }
</style>