Add keyboard shortcut to launch current map in Dungeon Keeper/KeeperFX

[dotted]

I suggest the F5 key.

[Loobinex]

F5 key is already in use to just save.

So we would need to:

• Implement the keyboard shortcut to launch the game
• A way to define the full command line you want to run at launch
• The ability to preview unsaved maps, or possibly a warning to save first.

[dotted]

Is there a reason to not just automatically save when you hit F5?

[Loobinex]

The reason you might not want it saved, is because there's no undo button in adikted. So:

1. Load a map
2. Make an experimental change
3. Preview in KeeperFX to see the change
   --> dislike the change and notice you cannot load to go back to before the preview