[Mutt] #2925: directory browser: use destination's time + size rather than symlink's

[Mutt <fleas@xxxxxxxx>]

#2925: directory browser: use destination's time + size rather than symlink's

 When have symlinks in directory, only interesting property is the type
 being symlink.
 Time + size of the link is uninteresting 99% because they rarely change,
 no benefit when the directory is sorted by time/ size,
 while the symlink's destination properties change whenever the file/ dir
 changes (by saving to or deleting from it).

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Ticket URL: <http://dev.mutt.org/trac/ticket/2925>