- Electron version: 1.4.0
- Operating system: Windows 7 (x64)

I launch Electron and then press `ALT` to show menu. Now you mouse click on any top-level menu item, active menu item will NOT be changed to down state. I checked with 1.3.5, it is fine.

atom/browser/ui/views/menu_bar.cc
#include "atom/browser/ui/views/menu_bar.h"
#if defined(USE_X11)
#include "gtk/gtk.h"
#endif
#include "atom/browser/ui/views/menu_delegate.h"
#include "atom/browser/ui/views/submenu_button.h"
#include "ui/base/models/menu_model.h"
#include "ui/views/background.h"
#include "ui/views/layout/box_layout.h"
#if defined(OS_WIN)
#include "ui/gfx/color_utils.h"
#elif defined(USE_X11)
#include "chrome/browser/ui/libgtk2ui/skia_utils_gtk2.h"
#endif
namespace atom {
namespace {
const char kViewClassName[] = "ElectronMenuBar";
const SkColor kDefaultColor = SkColorSetARGB(255, 233, 233, 233);
#if defined(USE_X11)
void GetMenuBarColor(SkColor* enabled, SkColor* disabled, SkColor* highlight,