Toggle loading property while (re)loading layers

lib/www/client/source/src/views/Map.vue

@@ -191,10 +191,12 @@ export default {
 
       const query = new URLSearchParams({bbox, limit});
 
+      let requestsCount = 0;
       for (const l of this.layerRefreshConfig.filter(i => !layerset || layerset.includes(i.layer))) {
         if (map.hasLayer(l.layer)) {
           // Firing all refresh events asynchronously, which is OK provided
           // we don't have hundreds of layers to be refreshed.
+          requestsCount++;
           await this.api([l.url(query)]).then( (layer) => {
             l.layer.clearLayers();
             if ((layer.features && layer.features.length < limit) || ("length" in layer && layer.length < limit)) {
@@ -202,9 +204,13 @@ export default {
             } else {
               console.log("Too much data from", l.url(query));
             }
+            if (--requestsCount == 0) {
+              this.loading = false;
+            }
           })
         }
       }
+      this.loading = requestsCount > 0;
     },
 
     ...mapActions(["api"])