Let us cram metal sheets, glass, and wires into manufacturers again

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Just make floortiles not be processable? I don't remember them being processable before.

Besides, is it really that bad if people can increase the amount of basic metal sheets by a bit? Metal is pretty plentiful on the station as things are. In general, it seems like a lot of troublesome and unintuitive behavior is being put in just to prevent people from duplicating common basic materials.