Graph: Also emit before state on change{Node,Edge,*Port,Properties}
Graph: Also emit before state on change{Node,Edge,*Port,Properties}

This is required to have invertible operations in the graph journal.

jonnor/noflo,npmcomponent/noflo-noflo,saurabhsood91/noflo,trustmaster/noflo,noflo/noflo,lxfschr/noflo,trustmaster/noflo,jonnor/noflo,saurabhsood91/noflo,lxfschr/noflo