[TASK] Optimize code

lib/datadistributor.js

@@ -97,8 +97,7 @@ define(['filters/nodefilter'], function (NodeFilter) {
       setData: setData,
       addFilter: addFilter,
       removeFilter: removeFilter,
-      watchFilters: watchFilters,
-      refresh: refresh
+      watchFilters: watchFilters
     };
   };
 });

lib/map.js

@@ -27,29 +27,25 @@ define(['map/clientlayer', 'map/labellayer', 'map/button', 'leaflet', 'map/activ
         document.querySelector('.leaflet-control-layers').classList.add('leaflet-control-layers-expanded');
       }
 
+      function mapActiveArea() {
+        map.setActiveArea({
+          position: 'absolute',
+          left: sidebar.getWidth() + 'px',
+          right: 0,
+          top: 0,
+          bottom: 0
+        });
+      }
+
       function setActiveArea() {
-        setTimeout(function () {
-          map.setActiveArea({
-            position: 'absolute',
-            left: sidebar.getWidth() + 'px',
-            right: 0,
-            top: 0,
-            bottom: 0
-          });
-        }, 300);
+        setTimeout(mapActiveArea, 300);
       }
 
       var el = document.createElement('div');
       el.classList.add('map');
 
       map = L.map(el, options);
-      map.setActiveArea({
-        position: 'absolute',
-        left: sidebar.getWidth() + 'px',
-        right: 0,
-        top: 0,
-        bottom: 0
-      });
+      mapActiveArea();
 
       var now = new Date();
       config.mapLayers.forEach(function (item, i) {

lib/utils/language.js

@@ -22,7 +22,7 @@ define(['polyglot', 'moment', 'helper'], function (Polyglot, moment, helper) {
     }
 
     function getLocale(input) {
-      var language = input || navigator.languages && navigator.languages[0] || navigator.language || navigator.userLanguage;
+      var language = input || navigator.languages && navigator.languages[0] || navigator.language;
       var locale = config.supportedLocale[0];
       config.supportedLocale.some(function (item) {
         if (language.indexOf(item) !== -1) {

lib/utils/version.js

@@ -50,10 +50,7 @@ define(function () {
     var ca = a.split('');
     var cb = b.split('');
     var diff = this.findIndex(ca, function (c, index) {
-      if (cb[index] && c === cb[index]) {
-        return false;
-      }
-      return true;
+      return !(cb[index] && c === cb[index]);
     });
     if (diff === -1) {
       if (cb.length > ca.length) {