This module manipulates an existing query, updating it according to business logic.

For example, it:

1. Figures out what the right granularity to group by time is
2. Adds a missing order_by clause to a query
3. Updating "time" dimension in order_by to the right granularity
4. Updates event:hostname filters to also apply on visit level for sane results.
5. Removes revenue metrics from dashboard queries if not requested, present or unavailable for the site.

Splits a query into event and sessions subcomponents as not all metrics can be queried from a single table.

event:page dimension is treated in a special way, doing a breakdown of visit:entry_page for sessions.