hello,
datalist actions are found in exploded share.war dir
webapps/share/js
webapps/share/components/data-lists
webapps/share/WEB-INF/classes/alfresco/site-webscripts/org/alfresco/components/data-lists
webapps/share/WEB-INF/classes/site-data/
Maybe to send an email when clicking email field in a yui datatable you could add a listener there…
Exporting like a xls or csv is not developed/supported yet, and it might be coming soon…
cheers