Ability to add any column to the top level logs view

[RoryCrispin]

In Explore mode, it's possible to configure which columns make up the log message presented in the main logs view. To do so, click the 'Eye' button on a field on the detail view (pictured)

This should be possible in the Dashboard view as well.

Workaround: build a fake body string using ClickHouse like:
SELECT concat('body: ', Body, ' logger_name: ', logger_name) as Body, Body as Body_raw, logger_name to

[SpencerTorres]

Possibly related: new Labels input: #941