New kind of filter – field filter

[piotr-dobrogost]

Having defined fields in the log format file, it would be handy to be able to pick a field from the list of all fields when creating a new filter. After picking which field we want to filter on, there could be a list of all distinct values of the field to choose the value from.

[piotr-dobrogost]

Actually, now, when filtering, there is no option to filter only by a specific field and not the whole message.
This new kind of filter would support filtering only by a specific field.
After introducing this new kind of filter, the current text filter should only operate outside of fields, but this would be a change in behavior.