• Fix up VGA DAC/palette mapping to display the emulator screen
  properly on 16-bit true color displays. Fixed off-by-one shift
  mistake in the DOSBox-X render scaler code that caused
  green and purple tints to colors on 16-bit true color displays.
• Add "Show menu bar" command to the Windows "system menu" so that
  the menu bar can be brought back after selecting "hide menu bar".
• Losing window focus while fullscreen no longer leaves the emulator
  window blank.
• Maximize/restore fullscreen cleanup.
• Removed DDRAW output.