FIX: Refunds in the convoy window were not shown using a money value
ADD: Graphs for "Departures" and "Scheduled" in the line management window.
- "Departures" shows the number of departures per game month made by convoys of that line that are from timed points in the schedule ("wait for time" or "wait for load" with spacing set).
- "Scheduled" shows the number of departures per game month that ought to be made by convoys of that line according to the schedule
WARNING: This alters the saved game version. Testers who self-compile should compile a version with SPECIAL_RESCUE_12_2 defined, load their 12.x saved games, re-save them, quit, then compile again without SPECIAL_RESCUE_12_2 defined to rescue saved games. Those using only released versions do *not* need to do this.
FIX: Show "Waiting for schedule" rather than "Loading" in the convoy tooltip when the convoy is waiting for a scheduled departure rather than just waiting for its loading time to expire.