[BUG] The game crashes when removing the station displayed in the schedule list

[RESTRICTED ACCOUNT]

I made a change to avoid the crash, but it's not perfect.
https://github.com/Ranran-the-JuicyPork/simutrans-extended/commit/f1bf79f1589be07d8b65377d955c76cbe1594b6d

Blanks are created because the list is not updated immediately. (If you reopen it, it will be normal.)
But it's better than causing a crash. The haltlist didn't crash, so I suspect something went wrong because the schedule list isn't the new GUI style.

[jamespetts]

Thank you for the fix - now incorporated. I will leave this in the open bug reports section for now so that we know that there is still a more minor issue that needs fixing.