Implement new 5.0 loading screen. (#8970)

* Implement new 5.0 loading screen.
* Remove old Kibana loading gif.
* Add Open Sans font files to public/assets/fonts dir, and remove some unused ones.
* Serve fonts directly from ui directory, using exposeStaticDir.

src/server/http/index.js

@@ -1,12 +1,9 @@
-import { parse } from 'url';
 import { format } from 'url';
+import { resolve } from 'path';
 import _ from 'lodash';
 import fs from 'fs';
 import Boom from 'boom';
 import Hapi from 'hapi';
-import HapiTemplates from 'vision';
-import HapiStaticFiles from 'inert';
-import HapiProxy from 'h2o2';
 import getDefaultRoute from './get_default_route';
 import versionCheckMixin from './version_check';
 import { shortUrlAssertValid } from './short_url_assert_valid';
@@ -140,6 +137,8 @@ module.exports = async function (kbnServer, server, config) {
     }
   });
 
+  server.exposeStaticDir('/ui/fonts/{path*}', resolve(__dirname, '../../ui/public/assets/fonts'));
+
   kbnServer.mixin(versionCheckMixin);
 
   return kbnServer.mixin(require('./xsrf'));

src/ui/index.js

@@ -10,9 +10,6 @@ import UiBundleCollection from './ui_bundle_collection';
 import UiBundlerEnv from './ui_bundler_env';
 
 export default async (kbnServer, server, config) => {
-
-  const loadingGif = readFile(fromRoot('src/ui/public/loading.gif'), { encoding: 'base64'});
-
   const uiExports = kbnServer.uiExports = new UiExports({
     urlBasePath: config.get('server.basePath')
   });
@@ -42,7 +39,6 @@ export default async (kbnServer, server, config) => {
 
   // render all views from the ui/views directory
   server.setupViews(resolve(__dirname, 'views'));
-  server.exposeStaticFile('/loading.gif', resolve(__dirname, 'public/loading.gif'));
 
   server.route({
     path: '/app/{id}',
@@ -81,7 +77,6 @@ export default async (kbnServer, server, config) => {
   function viewAppWithPayload(app, payload) {
     return this.view(app.templateName, {
       app: app,
-      loadingGif: loadingGif,
       kibanaPayload: payload,
       bundlePath: `${config.get('server.basePath')}/bundles`,
     });