Invoke angulajs $apply() just before triggering a programmatic opening/closing of folders.

It was getting to the point where I would have several calls to $apply() just before infoking openFolderSvc.open_folder(). It's better to invoke $apply() in a single point, inside openFolderSvc.open_folder() and just before the bootstrap code that triggers the open/close state of folders.
Open "all subscriptions" folder when a new subscription is added.
When unsubscribing from a feed, close all folders in the sidebar.