Zabbix

..F....... [DEV-641] fixed naming of dashboard-related files and actions

Controllers:
 - CControllerWidgetStatusView => CControllerWidgetSystemInfoView

Views:
 - monitoring.widget.status.view => monitoring.widget.systeminfo.view

Actions and widget types:
 - widget.stszbx.view => widget.systeminfo.view

Constants:
 - WIDGET_ZABBIX_STATUS => WIDGET_SYSTEM_INFO