ddfilelister: Now displays extended description in list view if the user has that setting enabled

ddfilelister version 2.05 - Now makes use of the user's extended file description setting: If
the user's extended file description setting is enabled, the lister will now show extended file
descriptions on the main screen in a split format, with the lightbar file list on the left and
the extended file description for the highlighted file on the right.
Also, made the file info window taller for terminals within 25 lines high.
This should resolve issue #363 .
This update to ddfilelister also requires the included update to dd_lightbar_menu.js and the
new attr_conv.js.