NVDA will no longer announce "pane" when minimizing windows. (PR #6691)
Fixes #6671
* added a top-level docstring describing the purpose of the explorer.exe app module.
* Each class definition is separated by two spaces for style purposes.
Original issue:
When pressing Windows=M or Windows+D, NVDA says, 'pane'. It turns out there is a window with the window class name of 'WorkerW' that presents a focus event. Thus suppress this, which means NVDA will no longer announce 'pane' when minimizing Windows. This bug affects various versions of Windows (tested with Windows 7 and Windows 10).