translucent navbar.
In cases where we were presenting modally, we can easily modify the
modal to have a translucent navbar.
In the one place we were pushing onto the SignalsNavigationController,
rather than modifying the SNC.isTranslucent and having to clean it up,
I've opted to convert to a modal presentation.
// FREEBIE
Shows the conversation picker, and sends the attachment to that
conversation.
There's still a lot TODO
-[ ] resolve JSQ dependency
-[ ] properly wait for app to load
-[ ] dismiss share extension after send is complete
-[ ] support non jpeg file types
-[ ] Fix device sleep manager
// FREEBIE
