Fix nuxeo-html-editor usage in a nuxeo-data-table-form

This is a regression brought by WebUI 3.0.3 (as it's working fine with webui-3.0.0 to webui-3.0.2

Steps to reproduce:

1. define a document type with a multi-valued complex with at least one String field used by the HTML editor
2. define a layout to fill the complex property. It can look like

         <nuxeo-data-table-form>
           <template>
             <nuxeo-html-editor value="{{item.descript}}"></nuxeo-html-editor> 
             <nuxeo-directory-suggestion value="{{item.language}}" label="Language" min-chars="0" directory-name="language" name="language"></nuxeo-directory-suggestion>
           </template>
         </nuxeo-data-table-form>
   

3. create a document of this type
4. edit the document and try to add an item to this multi-valued complex
5. put a value to the HTML editor and select a value for "language"
6. click on the OK button to validate
7. observe that the popup remains open

Expected behavior: the popup is closed when clicking on the OK button and the new value is visible in the table for the multi-valued complex field