* FIX: allow groups to access system queries (without having to run the query once first)
Bug is: Trying to allow a group to access a system query results in a Discourse::NotFound unless the query is run first.
Cause:
- System queries don't exist in the database by default
- update calls set_query before action
- set_query searches the database for the system query with Query.find_by(:id), which will not exist by default.
- running system queries first fixes this because Query.find is overridden to include system queries (Queries.default) in its results, avoiding the Discourse::NotFound.
Solution: use the overridden Query.find in set_query to include system queries in the search, instead of Query.find_by(:id)
* Added test for fixing allowing groups to access system query.
* Fixed test formatting.
