Fix bug: show type descriptions for plural, required, etc. types in hover
Fix bug: show type descriptions for plural, required, etc. types in hover

Reviewed By: captbaritone

Differential Revision: D30332317

fbshipit-source-id: f0dc46f1e402c4df2044c8b5ca90e2485178a976

kassens/relay,xuorig/relay,facebook/relay,kassens/relay,wincent/relay,voideanvalue/relay,wincent/relay,wincent/relay,voideanvalue/relay,kassens/relay,voideanvalue/relay,xuorig/relay,wincent/relay,kassens/relay,facebook/relay,facebook/relay,xuorig/relay,voideanvalue/relay,kassens/relay,facebook/relay,josephsavona/relay,kassens/relay,voideanvalue/relay,josephsavona/relay,wincent/relay,xuorig/relay,wincent/relay,xuorig/relay,josephsavona/relay,facebook/relay,facebook/relay,xuorig/relay,voideanvalue/relay