(svn r7086) -Featurette: Add additional positioning for long dropdown lists: first, try to fit the dropdown below the calling widget, as before; second, try to fit it wholly above the calling widget; and lastly, fit the list below the widget and add a scrollbar.

/* $Id$ */

KNOWN BUGS / PROBLEMS:

Normal and elrail depots look the same. Use 'X' (transparent buildings)
   to distinguish between them
Missing curors / icons for construction (currently using the conventional ones)