FeatureFlag and MenuSetting for render distance

[JaXt0r]

By default render distance is at 1000m. If we turn it down to e.g. 500, we get additional ~30fps and at ~300 we have additional ~70fps (on my PC). Therefore let's add this feature for gamers who prefer stable 90fps (etc.) and can spare a some meters of view.

Setting to be made: