Use the raw text when creating a highlight node instead of the
escaped text. This means \n spaces will be preserved in the
node and prevent spaces from being removed.
This reduces the fields on the highlight type, and reduces what
we fetch. We are doing this so its easier to bind from Swift and
pass back simpler types for create/update/merge highlight
operations
This will let us handle the mutations differently on native
iOS and should help in avoiding making web calls directly from
the web view, so we can avoid CORs and introduce a caching
layer.
