Remove 1px border left of bar atop posts view.
Fix transitions escaping out of tab view.

Looked really weird with the settings view on iPad.
Refresh all views when reachability changes.

When the app first starts, networking can take just long enough to start that
we appear offline. We should still refresh if we can once we're online.

This might make for weird behavior if people switch between online/offline
frequently for some reason.
Better handle updates to off-screen table views.

Seems to be causing some occasional problems.
Fix favorites screen a bit.

Fewer animated cells whizzing around when deleting favorites, and a more
sensible place to show the cover after the last deletion.
Restore short "back" button when viewing profile.

Showing the thread title was an oversight. Fixes #169