### 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_win.cc
NotifyWindowMaximize();
      } else if (w_param == SIZE_MINIMIZED &&
                 last_window_state_ != ui::SHOW_STATE_MINIMIZED) {
        last_window_state_ = ui::SHOW_STATE_MINIMIZED;
        NotifyWindowMinimize();
      }
      break;
    }
    case SIZE_RESTORED:
      switch (last_window_state_) {
        case ui::SHOW_STATE_MAXIMIZED:
          last_window_state_ = ui::SHOW_STATE_NORMAL;
          NotifyWindowUnmaximize();
          break;
        case ui::SHOW_STATE_MINIMIZED:
          if (IsFullscreen()) {
            last_window_state_ = ui::SHOW_STATE_FULLSCREEN;
            NotifyWindowEnterFullScreen();
          } else {
            last_window_state_ = ui::SHOW_STATE_NORMAL;
            NotifyWindowRestore();
          }
          break;
        default:
          break;
      }
      break;
  }
}
void NativeWindowViews::SetForwardMouseMessages(bool forward) {