nvda

113374ff - Prevent additional attempts at closing HID braille connections (#16712)

Prevent additional attempts at closing HID braille connections (#16712) Fixes #16218 Summary of the issue: NVDA could silently crash when a Braille HID device was disconnected/closed. Description of user facing changes No more crashes under the above conditions. Description of development approach Introduced a flag that tracks if the close() method has already been called, and don't perform the operation again.