#17 Volume selection bug

[johnsawyercjs]

When you click on the "Set" buttons for "Backup from
here" and "To here", you can't select the From and To
volumes from a "Computer" selection window--the one you
get when you click on the "Computer" icon at the top of
the sidebar (if you have the option to display the
Computer icon in Finder Preferences). You can select
volumes only by clicking on the volumes in the sidebar
of the selection window.