Fix numeric filter->mbql, fix flow/lint errors

frontend/src/metabase/dashboard/dashboard.js

frontend/src/metabase/meta/Card.js

frontend/src/metabase/meta/Card.spec.js

frontend/src/metabase/meta/Parameter.js

frontend/src/metabase/meta/Parameter.spec.js

frontend/src/metabase/meta/types/Metadata.js

frontend/src/metabase/meta/types/Parameter.js

frontend/src/metabase/meta/types/Visualization.js

...se/parameters/components/widgets/DateAllOptionsWidget.jsx

frontend/src/metabase/selectors/metadata.js

.../src/metabase/visualizations/components/Visualization.jsx

...end/src/metabase/visualizations/visualizations/Scalar.jsx