UI: Fixed load material icon fonts

ui-ngx/angular.json

@@ -63,7 +63,7 @@
               {
                 "glob": "**/*",
                 "input": "node_modules/material-design-icons/iconfont/",
-                "output": "/fonts"
+                "output": "assets/fonts"
               }
             ],
             "styles": [

ui-ngx/src/index.html

@@ -24,8 +24,8 @@
 
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <link rel="icon" type="image/x-icon" href="thingsboard.ico">
-  <link rel="preload" href="fonts/MaterialIcons-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous" />
-  <link rel="stylesheet" href="fonts/material-icons.css" />
+  <link rel="preload" href="assets/fonts/MaterialIcons-Regular.woff2" as="font" type="font/woff2" crossorigin="anonymous" />
+  <link rel="stylesheet" href="assets/fonts/material-icons.css" />
   <style type="text/css">
 
     body, html {