Support empty sections (headers/footers only) + Empty Section View? #110
Description
Currently, sections that are empty (no cells) are removed. Should we support allowing empty sections to stay in the collection? The use case would be showing a header/footer view. This is arguably not good UI/UX. Up for debate.
We support providing an "Empty View" to display for the entire collection when it is empty. (e.g.,ContentUnavailableView)
It might be cool to offer this on a per-section basis.
Implementation will be very different than for the whole collection.
We'll need to use a CellViewModel as a placeholder to keep the section in the collection. Then pretend it's empty, when it only has the placeholder "empty state" cell.