[Feature]: Only allow game host to use the in-game game speed slider, or remove it completely

[MJvst]

Is your feature request related to a problem? Please describe.

Often other players (who aren't the game host) are changing the game speed using the game speed slider once the game loads. This disrupts the game heavily w constant game speed changes and for everyone's game to keep up w the changes.

Describe the solution you'd like

Only allow the game host to change the game speed in-game

Describe alternatives you've considered

Remove the game speed slider completely in multiplayer - to avoid abuse from any players (game host included)

Additional context or screenshots

No response

[11EJDE11]

For reference, also filed here:
CnCNet/xna-cncnet-client#577