### Preflight Checklist
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* [x] I have read the [Contributing Guidelines](https://github.com/electron/electron/blob/master/CONTRIBUTING.md) for this project.
* [x] I agree to follow the [Code of Conduct](https://github.com/electron/electron/blob/master/CODE_OF_CONDUCT.md) that this project adheres to.
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*I found one but it's been closed since 2017 athough updates are still happening on it either close this issue and reopen that or make this the new issue #9092* 

### Issue Details

* **Electron Version:**
  * v10.1.1
* **Operating System:**
  * Windows 10 18363
* **Last Known Working Electron version:**
  * unknown

### Expected Behavior
calling `isMaximized()` to respond if the window is maximized 

### Actual Behavior
`isMaximized()` always returns false when transparent is set to true on BrowserWindow

### To Reproduce
https://gist.github.com/293ffab750b019714f12d8e1f203e611


### Additional Information
#9092 is a closed issue with people still reporting this problems but since it's closed I don't think admins are looking hence creating this issue.

shell/browser/native_window_views.cc
#if defined(USE_X11)
  if (!features::IsUsingOzonePlatform()) {
    const std::string color = use_dark_theme ? "dark" : "light";
    ui::SetStringProperty(static_cast<x11::Window>(GetAcceleratedWidget()),
                          gfx::GetAtom("_GTK_THEME_VARIANT"),
                          gfx::GetAtom("UTF8_STRING"), color);
  }
#endif
}
void NativeWindowViews::SetContentView(views::View* view) {
  if (content_view()) {
    root_view_->RemoveChildView(content_view());
  }
  set_content_view(view);
  focused_view_ = view;
  root_view_->AddChildView(content_view());
  root_view_->Layout();
}
void NativeWindowViews::Close() {
  if (!IsClosable()) {
    WindowList::WindowCloseCancelled(this);
    return;
  }
  widget()->Close();
}
void NativeWindowViews::CloseImmediately() {