Zabbix

 - support for changing of graph items (Alexei)
 - menu will not require more than three lines (Alexei)
 - fixed dividion by zero in chart2.php (Alexei)
 - period and start of interval are preserved in full-screen mode (Alexei)
 - added units in graph legends (Alexei)
 - table-like legend for user graphs (Alexei)