If that was the case I don't think Cookbot would have just wasted his time with the fix in the thread mentioned above, or a dozen or more members would have bought that fix. I guess you tried it before writing that? Maybe you bought a car that already has the fix, or an import or something with a different configuration, but UK cars don't do this.
Im aware UK cars don't have this option but mine came with this as standard (not a retrofit) as well as auto lowering mirrors for when you select reverse.
The way Wackosr explained it sounded as he had electric folding mirrors so i assumed he had the same problem as i had, i didn't realise until a couple of months later that the car had this feature...