This is the Diagnostics View in my Project.
link
But i think, there are a few things missing.
I ve got the Timestamp for raised, but i also want Timestamp for Acknowledged.
Icons for the Severity should be displayed for a quick overview.
I prefer the Messages to remain after Acknowledged in the list (perhaps like 1000 items),
sortable like for time raised, time acknowledged and so on.

The Refresh Time and the Initial displayed Severity should be accessible via Property
(not sure if already adressed)

Perhaps any other suggestions can be added here