Fix lint and flow errors

...rc/metabase/admin/datamodel/components/FieldRemapping.jsx

...d/src/metabase/modes/components/actions/PivotByAction.jsx

.../metabase/query_builder/components/AggregationPopover.jsx

...src/metabase/query_builder/components/BreakoutPopover.jsx

.../src/metabase/query_builder/components/BreakoutWidget.jsx

frontend/src/metabase/query_builder/components/FieldList.jsx

...end/src/metabase/query_builder/components/FieldWidget.jsx

...tabase/query_builder/components/filters/FilterPopover.jsx

...abase/modes/components/actions/PivotByAction.unit.spec.js

...t/metabase/query_builder/components/FieldList.e2e.spec.js