Fix: restore capability to add new points

src/Models/ThemeViewState/UserMapFeatureswitchState.ts

@@ -255,4 +255,30 @@ export class UserMapFeatureswitchState extends WithUserRelatedState {
             }
         )
     }
+
+    /**
+     * Shows the current GPS-location marker on the given map.
+     * This is used to show the location on _other_ maps, e.g. on the map to add a new feature.
+     *
+     * This is _NOT_ to be used on the main map!
+     *
+     * Note: this method is _incorrectly_ marked as not used
+     */
+    // @ts-ignore
+    public showCurrentLocationOn(map: Store<MlMap>) {
+        const id = "gps_location"
+        const layer = this.theme.getLayer(id)
+        if (layer === undefined) {
+            return
+        }
+        if (map === this.map) {
+            throw "Invalid use of showCurrentLocationOn"
+        }
+        const features = this.geolocation.currentUserLocation
+        return new ShowDataLayer(map, {
+            features,
+            layer,
+            metaTags: this.userRelatedState.preferencesAsTags,
+        })
+    }
 }