[Audacity-quality] Mac: Audacity reacts to shift key when it is not the front application

[Bill W. <bi...@go...>]

Tested on macOS 10.15.7
1) Start Audacity 2.3.3 or any later version (up to and including 3.0.0 a675b59)
2) Switch to or start TextEdit (or any other program)
3) Move the TextEdit window so you can see the Transport Toolbar in Audacity
4) Hold down the shift key
5) The play and record buttons respond to the shift key by changing their icons

Does not occur in 2.3.2 or earlier.

— Bill