In the fixupDoc function, serialized Lua objects are turned into regular
tables, and type information is lost. But it turned out to be needed to
restore the v90 flight log, since it uses a single "polymorphic" array
of records.

The v90 flight log uses a hash table for the entries and the names of
some fields do not match those from the recovery. Renamed in recovery
related routines for compatibility:

  - rename arbitrary field from 'text' to 'entry'

  - in the station log, change the 'time' field to 'deptime'

… and out of the new-game window.

The goal is to enact DRY, reducing the duplicated logic for rendering and serialzation of the flight log and cosolidating into one place.

So this:
 * Moved serialization (of which recovery is one version) of the flightlog into the flightlog code
 * Moves rendering of the flighog in the new-window screen to use the flight log rendering code

There are still some issues and ugly coupling remainng of the new-game window code and the flightog that needs unpicking around how we access the galaxy object to format log entries.  Perthaps we should do this once as the flight log entries are created, rather than on demand eavh frame of rendering.  This would help us clean up those dependencies.