fix: always index properties when feature properties as changed

We want the datalayer index properties to be updated when a user set
a property on the feature, as this property name may not yet be in the
index (which is used later for autocomplete, select…).

umap/static/umap/js/modules/data/features.js

@@ -213,6 +213,7 @@ class Feature {
       if (this._umap.currentFeature === this) {
         this.view()
       }
+      this.datalayer.indexProperties(this)
     }
     this.redraw()
   }