Need a Linux impl for https://github.com/electron/electron/pull/12485
atom/browser/native_window_views.cc
#if defined(OS_WIN)
  HMENU menu = GetSystemMenu(GetAcceleratedWidget(), false);
  MENUITEMINFO info;
  memset(&info, 0, sizeof(info));
  info.cbSize = sizeof(info);
  info.fMask = MIIM_STATE;
  if (!GetMenuItemInfo(menu, SC_CLOSE, false, &info)) {
    return false;
  }
  return !(info.fState & MFS_DISABLED);
#elif defined(USE_X11)
  return true;
#endif
}
void NativeWindowViews::SetAlwaysOnTop(bool top,
                                       const std::string& level,
                                       int relativeLevel,
                                       std::string* error) {
  if (top != widget()->IsAlwaysOnTop())
    NativeWindow::NotifyWindowAlwaysOnTopChanged();
  widget()->SetAlwaysOnTop(top);
}
bool NativeWindowViews::IsAlwaysOnTop() {
  return widget()->IsAlwaysOnTop();
}
void NativeWindowViews::Center() {