Win: Fix a problem where full dark mode was functioning as forced. Added sysmenu and icon for the window menu when operating in full dark mode. I can't seem to convert from a menubar to a popup menu... will keep looking but... because of this we will need to use the titlebar menu even in light mode when full dark mode is enabled. When dark mode is disabled or basic will use the classic menu bar. Also prefix some of the internal dark mode functions.

# Set these here to change the version for all platforms
DW_MAJOR_VERSION=3
DW_MINOR_VERSION=1