Notebooks Gallery (#59)

* Initial commit

* Address PR comments

* Move notebook related stuff to NotebookManager and dynamically load it

* Add New gallery callout and other UI tweaks

* Update test snapshot

src/Utils/UserUtils.ts

@@ -0,0 +1,17 @@
+import AuthHeadersUtil from "../Platform/Hosted/Authorization";
+import { decryptJWTToken } from "./AuthorizationUtils";
+import { CosmosClient } from "../Common/CosmosClient";
+
+export function getFullName(): string {
+  let fullName: string;
+  const user = AuthHeadersUtil.getCachedUser();
+  if (user) {
+    fullName = user.profile.name;
+  } else {
+    const authToken = CosmosClient.authorizationToken();
+    const props = decryptJWTToken(authToken);
+    fullName = props.name;
+  }
+
+  return fullName;
+}