Add mod download speed limit options

[spellboundtriangle]

My internet connection is weak to the point that downloading mods can disrupt gameplay and possibly sever my connection to the server. It would be nice if there were a setting to manually limit the download speed.

[Lakatrazz]

Outside of my knowledge currently, for now I'd recommend disabling mod downloading or lowering the max file size

[Bkerboy314]

Now add a way to remove the limit.