zabdig: list recent triggers

[hbos]

List recent triggers

Fields: Severity, Status, Time, Age, Host, Name Sorted by time makes sense (same as in webinterface).

If there are no objections to coloured output that would be fancy but can do without.

Just keeping it simple and limit the list with recent stuff or up to X items is good enough (maybe mention how many items are not shown for period <1 day).