Proper Realm Object Server Support

[TimOliver]

While the Realm Browser for iOS technically has all of the provisions in place in order to open synchronized Realms, it's never properly been tested before.

The two main parts needed to open a synchronized Realm are the server URL and the User object. The server URL can be saved in the internal Realm the browser manages, but User is contingent on the logged in users list not changing.

In order to properly support ROS Realms:

• Check that the appropriate information to open synchronized Realms is being captured.
• Account for scenarios such as a user logging out of a synchronized session.
• Test viewing the contents of a synchronized Realm.