Virtualize question list

* add other palletes and copy / paste for colors to the style guide

* use existing layout system for now

* copy to clipboard w/ notification

* minor tweaks

* use ace + copy button on style guide code examples

* use syntax highlighting

* start closed

* remove popover usage from accordian list examples

Automagic dashboards style/ux polish

* add segments method [ci skip]

* update test + prettier

* add segment and metric metadata methods

* prettier

* new components for easier question and result loading

* code review updates

* prettier

* Cleanup loader component tests, props, and flow types

* Cleanup question/result loaders, add rawQuery, add _internal Question demo app

* lint fix

Make sure NativeQueryEditor doesn't crash if ace isn't available. Was causing integration test failure

Refactor graph rendering to use chart.settings, pick better graph.x_axis.axis_enabled when they overlap

Fix Metabot's exceptions

Test fixes 

Sync 3.9