fix grey maps

apps/openstmap/interface.html

@@ -176,12 +176,14 @@ TODO:
   </div>
 </div>
                   `;
+                  setTimeout(function() {
                     let map = L.map(`tile-map-${mapNumber}`);
                     L.tileLayer(PREVIEWTILELAYER, {
                       maxZoom: 18
                     }).addTo(map);
                     let marker = new L.marker(latlon).addTo(map);
                     map.fitBounds(latlon.toBounds(2000/*meters*/), {animation: false});
+                  }, 100);
                 }
                 resolve();
               });