Use underlying db id for saved questions 'tables' in order to show correct notebook options + joinable questions

* Improved aggregation names for column names

* Fix tests

* Add Database auto_run_queries setting; code cleanup

* More code cleanup & test fixes

* Test fixes ?

[ci drivers]

* Tests to make sure you can use source queries that contain expressions
[ci drivers]

* Simplification of QP debugging fns

* Fix source queries w/ expressions (Bump MBQL -> 1.3.3)
[ci drivers]

Add datetime interval arithmetics

* Support nested queries with 2+ of the same aggregation; improve metadata

clean up add-settings & tests

* include field_refs in QP results :cols
* Remove u/drop-first-arg; rewirte Card filter functions as multimethod

* Include name of joined table in field display_name
[ci drivers]

* Fix linter errors

* Display metric name instead of underlying aggregation name in QP results
[ci drivers]
Resolves #1851

* Test fixes 

* [segments] fix edit segments; don't use diff for definition changes

* [segments] don't use diff at all on segment updates

* [metrics] don't use diff at all on metric updates either

* [segments] use original body fields + norm'd def

* [test] wip update metric/segment tests

* [test] add simple sql humanization tests wip

* [dict][test] humanization tests to keep sql reserved words whole wip

* [humanization] wip inverse+clean dict

* [humanization] test cases

* [humanization] more user test cases

* [humanization] remove certains words from dict

* Use classloader/require everywhere; un-HACK driver test HACKs
[ci drivers]

* Test fixes [ci drivers]

* Test fixes  [ci drivers]

* Oracle Test fixes [ci oracle]

* Don't send Pulses to inactive users; code cleanup

Tests to make sure native query isn't returned w/o ad-hoc native perms 

Use topological sorting for source query cycle detection