Move search field to top of AccordianList if alwaysExpanded=true

Fix nested query issue with SparkSQL driver [ci drivers]

Previously the driver was only looking one and two levels deep for the
source table. In the case of nested and binned queries, this could be
buried deeper in the MBQL query. This commit switches form an `or`
clause and a couple of `get-in`s to a `postwalk` that will find the
table however it's nested in the query.

xrays: Better related using per-entity/dashboard type recommendations

* grid breakpoints

* padding

* more padding

Add a shadow to toggle switches

Nicer xray suggestion cards

* fix all user collection crumb spacing

* new browse link

* change label

* show regardless of pinned items

* homepage blocks

* table x-ray and reference links

* overworld db links

* minor copy changes

* move personal collections

* copy changes

* remove GSG from userland

* change default collection name

* more updates

* microcopy cleanup

* prettier

* fix colors

* fix typo

* rm overworld links

* lint

Fix a lint warning in frontend/src/metabase/lib/urls.js

Revert "Add support for binning of nested queries"

Color consolidation [WIP]

Download functionality on embedded dashboards (feature 3847)

 Allow positive numeric values for text fingerprint average lengths 

Previously this only allowed double values. If the average length
happened to be something like `13.0` some Javascript implementations
trim the `.0` and when the frontend POSTs the data, it includes `13`
instead. This was causing our schema validation to break as it was
looking for a `Double`.

This commit changes the schema to look for a positive numeric value,
not just a positive double which covers both cases.

Update email troubleshooting docs