### Feature request

`customButtonsOnHover` fixes a lot of issues with drag and `pointer` styles, but my app currently uses `hidden-inset` so this setting changes the position of the buttons. I'd suggest `customButtonsOnHover` either be an option outside of `titleBarStyle` that respects `titleBarStyle`s values ('hiddenInset' or `hidden') or the addition of a `customButtonsOnHoverInset`.

As a separate note, the docs for `customButtonsOnHover` currently specify it's a Boolean type, but it's a string value.
shell/browser/api/electron_api_base_window.cc
std::vector<v8::Local<v8::Value>> ret;
  for (auto const& views_iter : browser_views_) {
    ret.push_back(v8::Local<v8::Value>::New(isolate(), views_iter.second));
  }
  return ret;
}
bool BaseWindow::IsModal() const {
  return window_->is_modal();
}
bool BaseWindow::SetThumbarButtons(gin_helper::Arguments* args) {
#if defined(OS_WIN)
  std::vector<TaskbarHost::ThumbarButton> buttons;
  if (!args->GetNext(&buttons)) {
    args->ThrowError();
    return false;
  }
  auto* window = static_cast<NativeWindowViews*>(window_.get());
  return window->taskbar_host().SetThumbarButtons(
      window_->GetAcceleratedWidget(), buttons);
#else
  return false;
#endif
}
#if defined(TOOLKIT_VIEWS)
void BaseWindow::SetIcon(gin::Handle<NativeImage> icon) {