Merged PR 4020: Sample tool redesign

Sample tool redesign - pictures below

Note: Demos section & Mobile are not available

Next steps:
1. Mobile view
2. Demos section - Layout & Bookmarks

![1.JPG](https://powerbi.visualstudio.com/4c7b5adb-c2d0-4f18-b23c-edc4ac30f4e1/_apis/git/repositories/1dd63332-e003-46a3-ac6f-70213a1bcc2e/pullRequests/4020/attachments/1.JPG)

![2.JPG](https://powerbi.visualstudio.com/4c7b5adb-c2d0-4f18-b23c-edc4ac30f4e1/_apis/git/repositories/1dd63332-e003-46a3-ac6f-70213a1bcc2e/pullRequests/4020/attachments/2.JPG)

![3.JPG](https://powerbi.visualstudio.com/4c7b5adb-c2d0-4f18-b23c-edc4ac30f4e1/_apis/git/repositories/1dd63332-e003-46a3-ac6f-70213a1bcc2e/pullRequests/4020/attachments/3.JPG)

![4.JPG](https://powerbi.visualstudio.com/4c7b5adb-c2d0-4f18-b23c-edc4ac30f4e1/_apis/git/repositories/1dd63332-e003-46a3-ac6f-70213a1bcc2e/pullRequests/4020/attachments/4.JPG)

![5.JPG](https://powerbi.visualstudio.com/4c7b5adb-c2d0-4f18-b23c-edc4ac30f4e1/_apis/git/repositories/1dd63332-e003-46a3-ac6f-70213a1bcc2e/pullRequests/4020/attachments/5.JPG)

Author: Amit Shuster

demo/package.json

@@ -35,7 +35,7 @@
     "fetch": "^1.0.0",
     "http-server": "^0.10.0",
     "jquery": "^3.1.0",
-    "powerbi-client": "2.4.5",
+    "powerbi-client": "2.4.7",
     "syntaxhighlighter": "4.0.1"
   },
   "devDependencies": {}