Major Add an attribute with a solrRequest such as
<attribute name="toto" type="content" contentType="org.ametys.plugins.odf.Content.subProgram" multiple="true">
<label i18n="false">Toto</label>
<description i18n="false">Toto</description>
<widget>edition.select-content</widget>
<widget-params>
<param name="solrRequest">parentPrograms_s:"${content.id}"</param>
<param name="modelId">search-ui.abstractprogram</param>
</widget-params>
</attribute>
the solrRequest add an extra null parameter in the dialogbox
(meanwhile the solrRequest is correctly taken in account)
