....I..... [ZBX-5789] removed unused fields in graph_discovery table

git-svn-id: svn://svn.zabbix.com/trunk@42691 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2
..F....... [ZBXNEXT-1910] added active since and active till columns in maintenance page

git-svn-id: svn://svn.zabbix.com/trunk@42693 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2
..F....... [ZBXNEXT-1735] removed graph and history link from items in lates data page, if history and trends are disabled

git-svn-id: svn://svn.zabbix.com/trunk@42708 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2