### 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](https://www.github.com/electron/electron/issues) for a feature request that matches the one I want to file, without success.

### Electron Version

12.0.5

### What operating system are you using?

Ubuntu

### Operating System Version

Ubuntu 21.04 x86_64 5.11.0-16-generic

### What arch are you using?

x64

### Last Known Working Electron version

_No response_

### Expected Behavior

All clicking inside the developer tool works well and not being interrupted by dragging the electron app.

### Actual Behavior

When I click the `option` and `close` tool inside the developer tool, it drags the electron app.

https://user-images.githubusercontent.com/61906684/118137437-666fd600-b42f-11eb-9443-ea1ebad1d0ec.mp4



### Testcase Gist URL

_No response_

### Additional Information

This bug only occurs if the dock position is on the left.
shell/browser/api/electron_api_browser_window.cc
window_unresponsive_closure_.Cancel();
  Emit("responsive");
}
void BrowserWindow::OnDraggableRegionsUpdated(
    const std::vector<mojom::DraggableRegionPtr>& regions) {
  UpdateDraggableRegions(regions);
}
void BrowserWindow::OnSetContentBounds(const gfx::Rect& rect) {
  
  
  window()->SetBounds(rect, false);
}
void BrowserWindow::OnActivateContents() {
  
#if !defined(OS_MAC)
  if (IsMenuBarAutoHide() && IsMenuBarVisible())
    window()->SetMenuBarVisibility(false);
#endif
}
void BrowserWindow::OnPageTitleUpdated(const std::u16string& title,
                                       bool explicit_set) {
  
  auto self = GetWeakPtr();
  if (!Emit("page-title-updated", title, explicit_set)) {
    
    if (self && !IsDestroyed())
      SetTitle(base::UTF16ToUTF8(title));
  }
}
void BrowserWindow::RequestPreferredWidth(int* width) {