Hide NSDocument's "move to" titlebar button

NoMoveWindow.swift

import AppKit

class NoMoveWindow: NSWindow {
   
    override class func standardWindowButton(b: NSWindowButton, forStyleMask m: Int) -> NSButton? {

        if b == NSWindowButton.DocumentVersionsButton {
            return nil
        }
        
        return super.standardWindowButton(b, forStyleMask: m)
    
    }
}