QoL3: Building product "leak" position icons

[Machenoid]

I've suddenly realised after all this time that new players won't know where exactly on the buildings a leaky and messy product like a gas or liquid will actually be output from (thanks to the new steam turbine placement artwork providing the hint that it requires a foundation)

It might seem obvious to the artist (or anyone with half a brain) that it's clearly an exaust pipe on the building, but an unambiguous icon would remove all doubt. No one is currently told that the Coal Generator outputs the carbon dioxide product from the upper-right tile of the 3x3 space it occupies, but it does. The same applies for output temperature of matter (the electrolyzer outputs at 70^oC) It would be preferable to not change the machinery art with arrows going in and out of the machine, but rather have a specific icon be placed at the location the offending liquid or gas is being produced from. This way the same standard is applied to every building; "A gas product comes out from this building, and here is where it comes out from" and the small info dialog attached to the mouse can have a string on it "Releases [matter name] [temperature] [matter state]" and if a building releases more than one product of the same state of matter (Electrolyzer) the icons can be color-coded or even changed to simple numbers (or chemical abbreviations "CO2" "H2" "H2O")