check if fast project mode before looking for unsaved change on feature detail page

src/views/Feature/FeatureDetail.vue

@@ -199,7 +199,7 @@ export default {
     ]),
 
     hasUnsavedChange() {
-      if (this.form) {
+      if (this.project.fast_edition_mode && this.form) {
         if (this.form.title !== this.currentFeature.title) return true;
         if (this.form.description.value !== this.currentFeature.description) return true;
         if (this.form.status.value !== this.currentFeature.status) return true;