graph_editor: use pydot to layout the graph server side

4 jobs for for_testrunner_1 in 0 seconds
Status Job ID Name Coverage
  External
passed ERP5.CodingStyleTest-TestRunner2

01:08:55

passed ERP5.UnitTest-TestRunner2

01:36:57

failed ERP5.UnitTest-Zope2-ForTestRunner1

01:55:35

failed ERP5.UnitTest-Zope2-ForTestRunner2

02:40:32