Display a TimelineAugmentView inside a modal. Augment date-based properties.
Validate that new CompositePropertyModel objects created during augmentation don't have the same name as an existing property.
Create PatternPropertyModel and ListAugmentView for splitting data that follows an identifiable patter (such as CSV). This implementation is not complete as the way we store Exhibits is about to change.
Merge branch 'feature/cherrypick_augmentation' into develop

Cherry-picking dataset editor improvements for augmentation that were missed in the merge, but ended up in feature/new_datamodel