to check why dataset version delete is called from here

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@20125 99afaf0d-6903-0410-885a-c66a8bbb5f81
disable insert if list is empty and user doesn't click "add" button

git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@20126 99afaf0d-6903-0410-885a-c66a8bbb5f81


git-svn-id: svn://svn.forge.objectweb.org/svnroot/spagobi/V_4.x/Server/trunk@20127 99afaf0d-6903-0410-885a-c66a8bbb5f81