[Feature] Possibility to Retrain Models (#190)

Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#190

epdb/views.py

@@ -955,6 +955,12 @@ def package_model(request, package_uuid, model_uuid):
                 ]
                 dispatch(current_user, evaluate_model, current_model.pk, multigen, eval_package_ids)
 
+                return redirect(current_model.url)
+            elif hidden == "retrain":
+                from .tasks import dispatch, retrain
+
+                dispatch(current_user, retrain, current_model.pk)
+
                 return redirect(current_model.url)
             else:
                 return HttpResponseBadRequest()