USB: Cancel queued transfers before waiting for idle.

Otherwise, stuck transfers will cause us to hit the not-idle assertion.
Should fix #19180.

src/add-ons/kernel/bus_managers/usb/Pipe.cpp

@@ -21,9 +21,10 @@ Pipe::Pipe(Object *parent)
 
 Pipe::~Pipe()
 {
-	PutUSBID();
+	PutUSBID(false);
-
 	Pipe::CancelQueuedTransfers(true);
+	WaitForIdle();
+
 	GetBusManager()->NotifyPipeChange(this, USB_CHANGE_DESTROYED);
 }