Winter coats/jackets no longer have thickmaterial flag.

This flag is for heavy armor suits and space suits, there is really no reason for winter coats and jackets to have it, it makes them a lot less cosmetic and a lot more powergamey. They're already super robust against the cold as it is.

HoS coat cries at the exclusion from the thickmaterial flag but I'd rather remove it from these coats than give it to the HoS as parapen protection.