nvda

f8507be4 - New handy tech display models (#9691)

New handy tech display models (#9691) * Added support for Connect Braille and Basic Braille 84. * Update what's new. * Added support for the Basic Braille Plus family of displays. Added sleep mode functionality so that applications can signal to the driver that it temporarily close its ports. * Hidden message window for Handy Tech driver is now always created and destroyed on the main ui thread. * Fixed line endings for modified files. * Cleaned up Handy Tech driver code. * Follow-up, getting rid of an inconsistency. * Final cosmetic corrections to Handy Tech driver. * Removed unnecessary import.