Merge pull request #61 from open-formulieren/feature/2173-map-background

Added property for automatic calculated tile layer url

src/formio/components/map.ts

@@ -45,6 +45,15 @@ export interface MapComponentSchema
    * The tile layer identifier used for the map component tile layer.
    */
   tileLayerIdentifier?: string;
+  /**
+   * The url belonging to the connected tile layer object, determined by
+   * tileLayerIdentifier.
+   *
+   * This value should not be definable by admins, but should be fetched
+   * from the related tile layer object. This happens when fetching the
+   * component from the backend.
+   */
+  tileLayerUrl?: string;
   /**
    * If true, the backend must apply the globally configured defaults to a particular
    * map instance. This results in populating `defaultZoom` and `initialCenter`, so for