Make it so you can navigate back to home page from the details page -- fix navigation throughout the app

https://trello.com/c/u2M8v13H/20-make-it-so-you-can-navigate-back-to-home-page-from-the-details-page-fix-navigation-throughout-the-app-need-design-help

In lieu of designs, I created my own back button.  Navigation works with
hierarchical back. Also cleaned up a little bit of design and added message when
there are no visits.