### Preflight Checklist
* [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.
* [x] I have searched the issue tracker for an issue that matches the one I want to file, without success.

### Issue Details

* **Electron Version:**
  * 10.1.1
* **Operating System:**
  * macOS 10.15.4

We recently started launching as hidden on macOS (that is, `show: false` or `browserWindow.hide()` while loading the page, followed by `browserWindow.show()` when the dock icon is clicked). This results in some busted focus behavior on the first activation of the window. The second activation restores it.

### Expected Behavior
The guest page receives a `focus` event on the first activation of the app, when created with `show: false`.

### Actual Behavior
The guest page doesn't receive the first `focus` event. Subsequent activations do trigger a `focus` event.

### To Reproduce
[Electron Fiddle](https://gist.github.com/CharlieHess/c507468cd40630d04f58c6514100b997)

shell/browser/api/electron_api_web_contents.cc
MarkDestroyed();
  
  if (managed_ontents()) {
    managed_ontents()->GetView()->SetDelegate(nullptr);
    RenderViewDeleted(ontents()->GetRenderViewHost());
    if (type_ == Type::BROWSER_WINDOW && owner_window()) {
      
      
      for (ExtendedWebContentsObserver& observer : observers_)
        observer.OnCloseContents();
      
      
      WebContentsDestroyed();
    } else if (Browser::Get()->is_shutting_down()) {
      
      DestroyWebContents(false );
    } else {
      
      
      bool is_browser_view = type_ == Type::BROWSER_VIEW;
      DestroyWebContents(!(IsGuest() || is_browser_view) );
      
      
      
      WebContentsDestroyed();
    }
  }
}
void WebContents::DestroyWebContents(bool async) {