Add RouteEntry module

https://bugzilla.gnome.org/show_bug.cgi?id=737321
sidebar: Add all entries to listbox

Keep all route entries in the listbox. And use the new RouteEntry
module to represent each row.

https://bugzilla.gnome.org/show_bug.cgi?id=737321
sidebar: Add drag-n-drop to route entries

https://bugzilla.gnome.org/show_bug.cgi?id=737321