This is a much better location for this button, as you send
money from one company to another company, not from player
to player.
This is based on work done by JGRPP in:
f820543391
and surrounding commits, which took the work from estys:
https://www.tt-forums.net/viewtopic.php?p=1183311#p1183311
We did modify it to fix several bugs and clean up the code while
here anyway.
The callback was removed, as it meant a modified client could
prevent anyone from seeing money was transfered. The message
is now generated in the command itself, making that impossible.
* Change: Replace checkbox in livery selection window with Default option in drop down selection.
This reduces clutter in the UI and allows for primary/secondary colours to independently follow the default scheme if desired.
* Feature: Add vehicle group liveries.