Unexpectedly, minimizing the window by clicking on its taskbar icon resulted
in a wxActivateEvent. This broke the focus handling in wxTLW and resulted in
debug messages about ::SetFocus() failure whenever the window was minimized in
this way.
It also seems that other existing code doesn't take into account the
possibility of getting an "active" activation event when the window is
minimized and this doesn't happen in the other ports, so don't send this event
in wxMSW neither.
Closes#17128.
8d6a2b3921