Refactor to only have MultipleRecordPicker and SingleRecordPicker What's done: - SingleRecordPicker, MultipleRecordPicker - RelationToOneInput - RelationFromManyInput - usage in TableCell, InlineCell, RelationDetailSection, Workflow What's left: - Make a pass on the app, to make sure the hotkeyScopes, clickOutside are properly set - Fix flashing on ActivityTarget - add more tests on the code