Merge branch 'release-0.26.0' into stabilize-integration-tests

...tend/src/metabase/dashboards/components/DashboardList.jsx

frontend/src/metabase/dashboards/containers/Dashboards.jsx

frontend/src/metabase/hoc/Background.jsx

frontend/src/metabase/new_query/containers/MetricSearch.jsx

...end/src/metabase/new_query/containers/NewQueryOptions.jsx

frontend/src/metabase/new_query/containers/SegmentSearch.jsx

frontend/src/metabase/new_query/router_wrappers.js

frontend/src/metabase/new_query/selectors.js

frontend/src/metabase/qb/components/actions/XRayCard.jsx

frontend/src/metabase/qb/components/actions/XRaySegment.jsx

frontend/src/metabase/reference/databases/FieldSidebar.jsx

frontend/src/metabase/reference/databases/TableSidebar.jsx

frontend/src/metabase/reference/segments/SegmentSidebar.jsx

frontend/src/metabase/xray/components/XRayLayout.jsx

frontend/src/metabase/xray/containers/CardXRay.jsx

frontend/src/metabase/xray/containers/FieldXray.jsx

frontend/src/metabase/xray/containers/SegmentXRay.jsx

frontend/test/__runner__/test_db_fixture.db.h2.db

frontend/test/hoc/Background.unit.spec.js

frontend/test/query_builder/NewQueryOptions.unit.spec.js