[Usability] The ``Replace File'' dialog should display the two file sizes, times, etc.

[Corey Burger <corey burger gmail com>]

Joachim Noreiko and I have been discussing a good UI for the subjects
use case at this bug:
http://bugzilla.gnome.org/show_bug.cgi?id=47893

Luis Villa mentioned that it might be a good idea to bring this bug
here, so I am. (Meant to do it for a while, kicked in the pants by
http://www.ubuntuforums.org/showthread.php?t=52484)

There are basically two ideas at odds here:

Mine: http://bugzilla.gnome.org/attachment.cgi?id=46071&action=view
Joachims: http://bugzilla.gnome.org/attachment.cgi?id=48083&action=view

Thoughts?

I realize this will miss 2.12, but if we can agree on something, it can hit .14

Corey