..F....... [ZBX-7930] improved execution time in Maintenance page

git-svn-id: svn://svn.zabbix.com/trunk@43597 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2
.......... [ZBX-7930] updated ChangeLog

git-svn-id: svn://svn.zabbix.com/trunk@43602 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2