Added: WOFF2 fonts for better performance in supported browsers (#1994)

src/UI/Content/font.less

@@ -6,6 +6,7 @@
     src: local('Open Sans Light'),
          local('OpenSans-Light'),
          url('./fonts/opensans-light.eot?#iefix') format('embedded-opentype'),
+         url('./fonts/opensans-light.woff2') format('woff2'),
          url('./fonts/opensans-light.woff') format('woff'),
          url('./fonts/opensans-light.ttf') format('truetype');
 }
@@ -18,6 +19,7 @@
     src: local('Open Sans'),
          local('OpenSans'),
          url('./fonts/opensans-regular.eot?#iefix') format('embedded-opentype'),
+         url('./fonts/opensans-regular.woff2') format('woff2'),
          url('./fonts/opensans-regular.woff') format('woff'),
          url('./fonts/opensans-regular.ttf') format('truetype')
 }
@@ -30,6 +32,7 @@
     src: local('Open Sans SemiBold'),
          local('OpenSans-SemiBold'),
          url('./fonts/opensans-semibold.eot?#iefix') format('embedded-opentype'),
+         url('./fonts/opensans-semibold.woff2') format('woff2'),
          url('./fonts/opensans-semibold.woff') format('woff'),
          url('./fonts/opensans-semibold.ttf') format('truetype')
 }
@@ -39,9 +42,10 @@
     font-style: normal;
     font-weight: 400;
     src: url('./fonts/ubuntumono-regular.eot');
-    src: local('Open Sans'),
-         local('OpenSans'),
+    src: local('Ubuntu Mono'),
+         local('Ubuntu-Mono'),
          url('./fonts/ubuntumono-regular.eot?#iefix') format('embedded-opentype'),
+         url('./fonts/ubuntumono-regular.woff2') format('woff'),
          url('./fonts/ubuntumono-regular.woff') format('woff'),
          url('./fonts/ubuntumono-regular.ttf') format('truetype')
 }