..F....... [ZBX-8665] fixed incorrect display of period in graph filter time bar
..F....... [ZBX-8665] fixed dragging the scrollbar beyond year 1970
..F....... [ZBX-8665] fixed calendar months to run in loop for years 1970 and 2038

git-svn-id: svn://svn.zabbix.com/trunk@49486 f4e7fd02-d210-4e34-a1e0-d4093fb66cc2