Merge branch 'segments' of github.com:metabase/metabase into segments

frontend/src/admin/databases/databases.controllers.js

frontend/src/admin/databases/databases.module.js

...end/src/admin/datamodel/components/ObjectActionSelect.jsx

...tend/src/admin/datamodel/components/ObjectRetireModal.jsx

...rc/admin/datamodel/components/database/MetadataEditor.jsx

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

...dmin/datamodel/components/database/MetricActionSelect.jsx

...nd/src/admin/datamodel/components/database/MetricItem.jsx

...d/src/admin/datamodel/components/database/MetricsList.jsx

...min/datamodel/components/database/SegmentActionSelect.jsx

...d/src/admin/datamodel/components/database/SegmentItem.jsx

.../src/admin/datamodel/components/database/SegmentsList.jsx

frontend/src/admin/datamodel/containers/SegmentApp.jsx

frontend/src/admin/datamodel/containers/SegmentForm.jsx

frontend/src/admin/datamodel/datamodel.controllers.js

frontend/src/admin/datamodel/datamodel.module.js

frontend/src/admin/datamodel/reducers.js

frontend/src/admin/datamodel/selectors.js

frontend/src/admin/people/people.controllers.js

frontend/src/admin/people/people.module.js