good first issuetask: help-wanted
Descrizione
Why you need it?
New version state machine designer uses JSON with style information that is great similar to the user-written JSON. However, the JSON file that old version (i.e., the one implemented in GGEditor) is in a very different form. The new version should be backward-compatible.
How it could be?
Extend SagaImporter to be backward-compatible.
Other related information
Please merge related PR to the refactor_designer branch.