Merge pull request #5790 from metabase/new-question-flow-p2

frontend/interfaces/underscore.js

frontend/src/metabase-lib/lib/metadata/Metadata.js

frontend/src/metabase-lib/lib/metadata/Metric.js

frontend/src/metabase-lib/lib/metadata/Segment.js

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

frontend/src/metabase/components/SearchHeader.css

frontend/src/metabase/components/SearchHeader.jsx

frontend/src/metabase/containers/EntitySearch.jsx

frontend/src/metabase/css/containers/entity_search.css

frontend/src/metabase/css/core/colors.css

frontend/src/metabase/css/core/grid.css

frontend/src/metabase/css/core/layout.css

frontend/src/metabase/css/core/rounded.css

frontend/src/metabase/css/index.css

frontend/src/metabase/lib/redux.js

...tend/src/metabase/new_query/components/NewQueryOption.jsx

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

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

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

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