Address multiple user issues while configuring Data

[Zakeelm]

We launched both the App Center Data and Auth services in early May, and will spend most of the month working on issues and making improvements based on user feedback. So far, we're looking to accomplish the following:

• [x] Add documentation links to Auth and Data UI page.
  • The goal is to make our documentation and getting started pages more discoverable to help users complete the setup.
• [x] Refresh AAD token automatically so developers only have to sign in to App Center once when using Auth and Data
• [x] Different UI states based on user's Azure permissions for MBaaS
  • Only developers with the right admin permissions in Azure can access the resources for a Cosmos DB instance. For developers who do not have the right permissions, we want to ensure that we have friendly error states that give developers actionable next steps to obtain the right permissions.
• [x] Improve documentation and portal/wizard information around how the Data service works both in portal and in documentation

[Zakeelm]

Closing this. We have shipped each of the small features in this thread! 😁 As a result, we have a more streamlined and easy-to-use portal experience for the Data service.