Merge branch 'dev-gql-tree-api' of ssh://gitlab.iscpif.fr:20022/gargantext/haskell-gargantext into dev-merge

Merge branch '90-dev-hal-fixes' of ssh://gitlab.iscpif.fr:20022/gargantext/haskell-gargantext into dev-merge

The ui_cwTouchMail is not used, it should be removed in the future.

Merge branch '104-dev-john-snow-nlp' of ssh://gitlab.iscpif.fr:20022/cgenie/haskell-gargantext into dev-merge

Merge branch '106-dev-ngrams-score-fix' of ssh://gitlab.iscpif.fr:20022/gargantext/haskell-gargantext into dev

For nearby terms `["a", "b", "c"]` we concatenated them into one
`"a b c"`. Instead we should leave the singletons as well:
`["a", "b", "b", "a b", "a c", "b c", "a b c"]`.