bob's removed electrum from plates.

Plates 0.16.4:
Updated the Logistic tab icon to use new robot graphics
Removed electrum
Added Pure water recipe colours for the chemical plant.

I did not test this, but according to this reddit post: https://www.reddit.com/r/factorio/comments/80e4q2/version_01626/duvnzup/ the Infinite Ore mod seems to be buggy in the current experimental release. I just loaded my save running around doing stuff and my iron stopped flowing, this is true inf...