Icon fonts available offline

static/style.css

@@ -22,6 +22,40 @@ span {
   display: inline-block;
 }
 
+@font-face {
+  font-family: 'Material Icons';
+  font-style: normal;
+  font-weight: 400;
+  src: local('Material Icons'),
+    local('MaterialIcons-Regular'),
+    url(/static/MaterialIcons-Regular.ttf) format('truetype');
+}
+
+.material-icons {
+  font-family: 'Material Icons';
+  font-weight: normal;
+  font-style: normal;
+  font-size: 24px;  /* Preferred icon size */
+  display: inline-block;
+  line-height: 1;
+  text-transform: none;
+  letter-spacing: normal;
+  word-wrap: normal;
+  white-space: nowrap;
+  direction: ltr;
+
+  /* Support for all WebKit browsers. */
+  -webkit-font-smoothing: antialiased;
+  /* Support for Safari and Chrome. */
+  text-rendering: optimizeLegibility;
+
+  /* Support for Firefox. */
+  -moz-osx-font-smoothing: grayscale;
+
+  /* Support for IE. */
+  font-feature-settings: 'liga';
+}
+
 .header {
   list-style-type: none;
   margin: 0;

views/cesium.tpl

@@ -28,7 +28,7 @@
   <script src="/static/receiver_configurator.js"></script>
   <script src="/static/interest_areas.js"></script>
   <link href="https://cesium.com/downloads/cesiumjs/releases/1.76/Build/Cesium/Widgets/widgets.css" rel="stylesheet">
-  <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
+  <!-- <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet"> -->
   <link href="/static/style.css" rel="stylesheet">
   <link href="/static/menu.css" rel="stylesheet">
 </head>