fix error: includes is undefined (#1155)

Author: Sonia-96

tethys_layouts/static/tethys_layouts/map_layout/map_layout.js

@@ -304,7 +304,7 @@ var MAP_LAYOUT = (function() {
         let feature_id = feature.getId();
 
         if (feature_id) {
-            if (feature_id.includes('.fid')) {
+            if (feature_id.includes != undefined && feature_id.includes('.fid')) {
                 // Derive fid from ID assigned by GeoServer (<layer_name>.<fid>)
                 // e.g.: 0958cc07-c194-4af9-81c5-118a77d335ac_stream_links.fid--72787a80_169a16811e6_-7aa6
                 feature_id = feature_id.split('.')[1];