Saving from rasa-nlu-trainer GUI overwrites regex_features and entity_synonyms

[srajan3012]

When I click on the save button in the rasa-nlu-trainer GUI, it saves the training data to training.json but also overwrites regex_features and entity_synonyms to their initial value i.e. to what they were at the time rasa-nlu-trainer was started.

regex_features and entity_synonyms are not supported in GUI yet, so they have to be manually added. The issue is, If any regex_features or entity_synonyms are added In between two SAVE button clicks, those manual additions are lost and overwritten.