Form component: Add support for redirect_to in the controller.

Analogue to #317.

Author: fiedl

app/concepts/matestack/ui/core/form/form.js

@@ -137,7 +137,7 @@ const componentDef = {
           && self.componentConfig["success"]["transition"]["follow_response"] === true
           && self.$store != undefined
         ) {
-          let path = response.data["transition_to"]
+          let path = response.data["transition_to"] || response.request.responseURL
           self.$store.dispatch('navigateTo', {url: path, backwards: false})
           return;
         }