do not update fine view on sync

Author: André Gaul

views/fine.js

@@ -9,7 +9,6 @@ module.exports = Backbone.View.extend({
     this.proxyView = options.proxyView;
     this.layer = L.markerClusterGroup().addTo(this.proxyView.mapView.map);
     this.subviews = {};
-    this.listenTo(this.collection, 'sync', this.render);
     this.listenTo(this.collection, 'add', this.addModel);
     this.listenTo(this.collection, 'remove', this.removeModel);
     this.render();

views/fineMarker.js

@@ -17,7 +17,10 @@ module.exports = Backbone.View.extend({
       .addTo(this.layer);
   },
   remove: function() {
-    this.layer.removeLayer(this.marker);
+    if (this.marker) {
+      this.layer.removeLayer(this.marker);
+      this.marker = undefined;
+    }
   }
 });