[Tracker] Specific metadata visualization in tracker-search-tool

[Luca Ferretti <elle uca libero it>]

A silly question.

Currently T-S-T is using libtracker-gtk to show in bottom area
additional info about current selection in search results. If I'm right,
it should show, for example, Author, Title, Album for music files and
Camera Model, Exposure and Focal for JPg(+EXIF).

But in my trunk build, I'm only able to see basic info (path, size,
modified, MIME).

It's a bug or a missing feature?