[host] fix faults caused by improper startup/shudown/restart ordering

host/platform/Windows/src/mousehook.c

@@ -146,6 +146,7 @@ void mouseHook_remove(void)
 {
   if (!mouseHook.event)
     return;
+
   SetEvent(mouseHook.event);
   WaitForSingleObject(mouseHook.thread, INFINITE);
   CloseHandle(mouseHook.thread);

host/platform/Windows/src/platform.c

@@ -146,7 +146,6 @@ static int appThread(void * opaque)
   int result = app_main(app.argc, app.argv);
 
   Shell_NotifyIcon(NIM_DELETE, &app.iconData);
-  mouseHook_remove();
   SendMessage(app.messageWnd, WM_DESTROY, 0, 0);
   return result;
 }