[NTVDM]

[NTVDM]
- Implement Ctrl-C using interrupt 0x23.
- Fix INT 21h, AH = 0Ah to detect special characters.
- When attaching to / detaching from the console, adjust the console mode
  and attach/detach the UI.
- Do not translate scancodes to characters while ALT is held down.

svn path=/trunk/; revision=67002