Feature: Add icons to navbar for quick actions

[kerrishotts]

For example: add some icons to highlight the currently selected verse. Same for bookmark. Same for note.

The problem here isn't the iPad -- there's plenty of space up there -- it's the iPhone. To that end, we've moved the search bar down, but there's still /very/ limited room there. Maybe three icons at the most?

A side-benefit of doing this, however, is we could remove the displayed options from the popover/action-sheet that appears on a long-press. This would especially help on the iPhone where the list is already quite long.

[kerrishotts]

This needs a good & consistent UI to accomplish. Not sure that's in the cards for v1.