Merge branch 'master' of https://github.com/metabase/metabase into fix-6508

docs/administration-guide/07-segments-and-metrics.md

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

...ase/admin/databases/components/DatabaseSchedulingForm.jsx

...tabase/admin/databases/components/DeleteDatabaseModal.jsx

frontend/src/metabase/app.js

frontend/src/metabase/components/ChannelSetupModal.jsx

frontend/src/metabase/components/CheckBox.jsx

frontend/src/metabase/components/SchedulePicker.jsx

frontend/src/metabase/icon_paths.js

frontend/src/metabase/lib/formatting.js

frontend/src/metabase/lib/i18n-debug.js

frontend/src/metabase/lib/pulse.js

frontend/src/metabase/lib/schema_metadata.js

frontend/src/metabase/lib/time.js

frontend/src/metabase/pulse/actions.js

frontend/src/metabase/pulse/components/CardPicker.jsx

frontend/src/metabase/pulse/components/PulseCardPreview.jsx

frontend/src/metabase/pulse/components/PulseEdit.jsx

frontend/src/metabase/pulse/components/PulseEditCards.jsx

frontend/src/metabase/pulse/components/PulseEditChannels.jsx