Can't login back into app when facebook session expires

[ashvindersingh]

• Install the latest couchbase-lite-ios framework with forestdb
• Create and share list
• Let the app remain idle for few minutes
• Got a prompt saying facebook session expired
• Press login button
• Got facebook confirmation page displaying "You have already authorized Todo-Lite"
• Press "Ok" button
• Get "Error" prompt. Displaying Facebook Login Error. Please try again. With "OK" button.
• The above process repeats with unable to login.