Add ability to add/update predicates for [uid] type. #108
Description
In the Schema tab, the uid type has checkboxes for count and reverse, but not for list. In Dgraph v1.1 it's possible to create either uid or [uid] predicates.
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In the Schema tab, the uid type has checkboxes for count and reverse, but not for list. In Dgraph v1.1 it's possible to create either uid or [uid] predicates.