When activating a window and sending activation messages to the window
procedure, Windows avoids a recursive loop by not sending more of these
messages or hooks while it's still activating the window. Some applications
actually depend on this behavior, so it is needed.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=46274Signed-off-by: Gabriel Ivăncescu <gabrielopcode@gmail.com>