Add comtypes module to Windows build for the taskbar progress extension. - #1126

1634125118.638199 [gpodder.log] ERROR: Uncaught exception: Traceback (most recent call last):
  File "C:\gpodder-3.10.21-portable\data\share\gpodder\extensions\taskbar_progress.py", line 164, in callback
    self.window_handle = window.window.handle
AttributeError: 'ApplicationWindow' object has no attribute 'window'

Traceback (most recent call last):
  File "C:\gpodder-3.10.21-portable\data\share\gpodder\extensions\taskbar_progress.py", line 164, in callback
    self.window_handle = window.window.handle
AttributeError: 'ApplicationWindow' object has no attribute 'window'

    def on_ui_object_available(self, name, ui_object):
        def callback(self, window, *args):
            #make sure to call ensure_native before e.g. on realize
            if not window.get_window().has_native():
                print("Your window is gonna freeze as soon as you move or resize it...")
            ctypes.pythonapi.PyCapsule_GetPointer.restype = ctypes.c_void_p
            ctypes.pythonapi.PyCapsule_GetPointer.argtypes = [ctypes.py_object]
            drawingarea_gpointer = ctypes.pythonapi.PyCapsule_GetPointer(window.get_window().__gpointer__, None)            
            #get the win32 handle
            gdkdll = ctypes.CDLL ("libgdk-3-0.dll")
            self.window_handle =  gdkdll.gdk_win32_window_get_handle(drawingarea_gpointer)

        if name == 'gpodder-gtk':
            ui_object.main_window.connect('realize',
                    functools.partial(callback, self))

1634125824.664181 [gpodder.util] WARNING: Could not create directory C:\gpodder-3.10.21-portable\config\Downloads\The Moth: Operation not supported
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