Alerts for hidden/deleted log entries

[kribor]

In some scenarios it would be good to not have to view 100 log entries of a certain entry but even though 100 is normal (and you therefore don't want to see it 1000 times) you may want a critical alert if it hits 1000 entries.

If entries can be grouped efficiently from the "day"-view so that you would only have to read one line with x number of ocurrences this feature might be unnecessary - currently this could be tricky due to PIDs etc. changing which ends up making rows non-unique