Merge branch 'master' into docs-fixes [ci skip]

.circleci/config.yml

docs/administration-guide/01-managing-databases.md

docs/administration-guide/databases/bigquery.md

docs/administration-guide/databases/snowflake.md

docs/administration-guide/images/bigquery_add_database.png

docs/administration-guide/images/database-actions.png

docs/administration-guide/images/database-added.png

docs/enterprise-guide/authenticating-with-saml.md

docs/operations-guide/environment-variables.md

frontend/src/metabase-lib/lib/queries/NativeQuery.js

...c/metabase/admin/databases/containers/DatabaseEditApp.jsx

...tabase/admin/datamodel/components/database/ColumnItem.jsx

...abase/admin/datamodel/components/database/ColumnsList.jsx

...ase/admin/datamodel/components/database/MetadataTable.jsx

frontend/src/metabase/admin/tasks/containers/Help.jsx

frontend/src/metabase/components/AccordionList.jsx

frontend/src/metabase/components/Grabber.jsx

frontend/src/metabase/components/form/CustomForm.jsx

frontend/src/metabase/components/form/FormField.jsx

frontend/src/metabase/components/form/StandardForm.jsx