Found out that this trick can be used in lots of places, the start menu for example, context menus and the main explorer window, you can also add another property that will stop images growing more then the original size when used in explorer
Int > TrueSizeStretchMark not sure what the measurement is in but setting a size of 250 seems to work best on a 1080p monitor, setting it to 200 will fail to maintain the max image size in max windows.