check for modification of assigned_member before leaving feature detail page in fast edition

src/views/Feature/FeatureDetail.vue

@@ -284,6 +284,7 @@ export default {
         if (this.form.title !== this.currentFeature.properties.title) return true;
         if (this.form.description.value !== this.currentFeature.properties.description) return true;
         if (this.form.status.value !== this.currentFeature.properties.status) return true;
+        if (this.form.assigned_member.value !== this.currentFeature.properties.assigned_member) return true;
 
         // Iterate over extra forms to check for any changes.
         for (const xForm of this.$store.state.feature.extra_forms) {