Merge branch 'release-0.20.0' of github.com:metabase/metabase into fix-faded-dashcards

docs/administration-guide/09-single-sign-on.md

docs/administration-guide/10-getting-started-guide.md

docs/administration-guide/images/gsg/blank-guide.png

docs/administration-guide/images/gsg/finished-guide.png

docs/administration-guide/images/gsg/pick-items.png

docs/administration-guide/images/gsg/sections.png

docs/administration-guide/start.md

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

...tend/src/metabase/dashboard/components/AddSeriesModal.jsx

frontend/src/metabase/dashboard/components/Dashboard.jsx

...se/dashboard/components/parameters/widgets/TextWidget.jsx

frontend/src/metabase/dashboard/dashboard.js

frontend/src/metabase/icon_paths.js

frontend/src/metabase/lib/formatting.js

frontend/src/metabase/lib/schema_metadata.js

frontend/src/metabase/lib/visualization_settings.js

frontend/src/metabase/meta/Dashboard.js

frontend/src/metabase/query_builder/NativeQueryEditor.jsx

...ase/query_builder/QueryVisualizationObjectDetailTable.jsx

frontend/src/metabase/query_builder/dataref/FieldPane.jsx