RGPD: the user should be able to leave and delete all his data
Summary
Being compliant with RGPD needs this feature: user should be able to leave and delete all his data on the server.
Steps to reproduce
In the Tree, Select the Flow icon of the RootNode with the username and try to trash this node.
What is the current bug behavior?
For now, the user can not delete is own account, with a message.
What is the expected correct behavior?
The user should be able to delete is RootNode and all the contexts he inserted that are not used anymore should be deleted: it means we need backend SQL function to delete all orphan contexts.