Update Graph Editor

* Fixes https://erp5js.nexedi.net/#/bug_module/20160609-11B02E6 and https://erp5js.nexedi.net/#/bug_module/20210517-F12266
* Support ERP5JS
* Improve test coverage
* Small CSS changes
* Fix bug editing business process when erp5_graph_editor was installed 

See merge request !1461