This isn't functional yet.

Merge branch '142-ngramstable' of ssh://gitlab.iscpif.fr:20022/gargantext/purescript-gargantext into dev

Instead of tracking data via refs and reinitializing the graph, combine
graphVersion state with key derived from graph nodeId.

Currently works for folder Public/Shared. Private ones are not working,
API needs to be adjusted.

eliminates "treeState" that was a tuple of async tasks and props-derived tree state, to make all tree data use the real loaded state