New schema for alarm states

Zabbix must provide configurable visualization (visual style) for different problem states:

• Unacknowledged problem
• Acknowledged problem
• Unacknowledged recovery (OK)
• Acknowledged recovery (OK)

For each state it should be possible to configure how the problem is displayed: steady colour or blinking colour.

It will affect all GUI screens displaying individual events or triggers under monitoring section.

It will not be possible to specify blinking period as it may introduce confusion when blinking stops, i.e. it will not be possible distinguish between acknowledges and unacknowledged problem when latter stopped blinking and they use the same visual style.