v17-pre5

I've been busy but managed to eke out some bugfixes this week as well as a change to seating layouts that I've been mulling in my head for a while. See the picture above--the idea is that casual players will now usually pick one of the 3 default seat classes, but experienced players will be able to min-max as they please using the same percentage mechanics that I have received a lot of positive feedback on.

As always, I'd like to thank everyone for all the feedback I've received. I look forward to going through all of it over the next few weeks as I seek to polish the new mechanics that I've added for the Puffin Planes Planes Update.

v17-pre5
Changes:
- Seating layouts have been given a casual makeover; you can still access the precise sliders by clicking on 'Custom', but more casual players will probably just use one of the main presets in the flight GUI.
Bugfixes:
- Fixed bug where you could not change just the next stop pax threshold or wait time after making a plane.
- Fixed bug where you could not buy out another airline.
- Fixed bug where the world would disappear if you tried to play alone.
- Fixed bug where the AI would not buy new planes in Creative mode.
- Fixed bug where you did not get miles when you sold a plane.
- Fixed bug where you cannot start any route if you have negative miles.
- Fixed bug where you could not evict another airline.
- Fixed bug where AI revoking codeshares would not work properly.
- Fixed bug where AI plane orders would not get transferred to you when you buy them out.
- Fixed bug where you cannot retrofit older aircraft.
- Fixed bug with flight plan GUI route item arrows showing float max value.
- Fixed bug with long runways not being taken into account in some circumstances.
- Fixed bug where plane tooltips would not show the proper number of seats for each class if changed.