Show player list in multiplayer in global goals

Show the actual list of players/client of each company in the global goals window when in a multiplayer game.

Requires creating fake vehicle groups, as raw strings don't work; there's a commented section in the source code for this with raw strings)

Example (courtesy of [dP](https://github.com/ldpl)):

Start in the global goals window code and inspect the commented source section that attempts to use raw strings for player or client names. Determine how fake vehicle groups can represent each company's player list in multiplayer, then verify that the actual players appear for every company in the global goals window.

Written by the indexing model from the issue text.