Fix nux hangs (Fixes #114)

Fixes hangs on adding blogs, and then being able to tap the next screen shown after.

There are many more places where this will be beneficial. It's also best to have a consistent way of performing core data tasks through a small number of interfaces. We'll work on that in the coming days.

We used an account with many blogs to test: xtremeqa3@gmail.com. Message Rebecca/h4xnoodle on Skype/IRC for the password to test.