nvda

b67e7f46 - NVDA source code and user guide: remove Windows 8 constant mentions (#15666)

NVDA source code and user guide: remove Windows 8 constant mentions (#15666) Closes #15663 Closes #15664 Summary of the issue: Remove mention of Windows 8 (winVersion.WIN8) constant from source code, and for the user guide, remove Windows 8 mention from audio ducking setting. Description of user facing changes None Description of development approach winVersion: isFullScreenMagnificationAvailable will return Windows 8.1 or later. WTS lock session: removed private Windows 7 enumeration. User guide: edited audio ducking setting paragraph.