Keep full option

Issue description

I think this is bug or someone dont look at this, storages had function keep full to work for trucks but this should work too for belts/pipes , if i set i want in water tank water level at half then until in this tank is not 50 % then it shouldnt give water to next connected storage/device, its for creating reserves. we have some notifications as alarms but i think they need sound or you can even dont bats eye on some text on screen when you building.

Reproduction steps

1. build storage any type
2. fill it
3. set keep full
4. connect any device storage by belts/pipes
5. you have empty storage with setting keep full

Game version and build number

latest

Operating system

Windows

This is not a bug. It only works for trucks, and that's why the truck icons are shown there.

hmm icons are above yes, and they are for import export by tuck, there is priority but still i think this should work for belts too, but ok there is no automation anyway.

We added dedicated sliders just for belt control in Update 3