Geospatial maps: Better "no points" handling

* If no results for browse or search
  maps are available, zoom to 1 and
  show a i18n tooltip
* Added a missing i18n for point filter
* New default centre point added to
  configuration

src/environments/environment.test.ts

@@ -448,5 +448,9 @@ export const environment: BuildConfig = {
     tileProviders: [
       'OpenStreetMap.Mapnik',
     ],
+    defaultCentrePoint: {
+      lat: 41.015137,
+      lng: 28.979530,
+    },
   },
 };