Allow grouping by column content in table view

[nicomen]

It would be really nice to quickly see accumulated and counted view of the columns in the table view, this lets one quickly get top entries of various things.

The accumulation can be done in the front based on the lines it has already got and store them with the content as a a key in a hash.

[rashidkpc]

You can click on any field name in the field list to the left to quickly get counts of the top values for a field. Accomplishing this in a more comprehensive manner would require field collapsing. Here's the elasticsearch issue for it: elastic/elasticsearch#256

[stephanos]

The issue elastic/elasticsearch#256 has been fixed. Can we re-open this again? We would love to group our logs by request and scroll through a user's activity, with messages per request grouped together.