don't show move if only one license

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@23109 35612d4c-9d10-0410-837c-bf9dd1be60d7
CS previous

git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@23110 35612d4c-9d10-0410-837c-bf9dd1be60d7