Put Services submenu into the Apple menu on OS X.

Native applications have a Services submenu in the apple menu.  wx
applications didn't until now.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_3_0_BRANCH@75227 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/menu_osx.cpp

@@ -615,6 +615,9 @@ static wxMenu *CreateAppleMenu()
         appleMenu->AppendSeparator();
     }
 
+    appleMenu->Append(wxID_OSX_SERVICES, _("Services"), new wxMenu());
+    appleMenu->AppendSeparator();
+
     // standard menu items, handled in wxMenu::HandleCommandProcess(), see above:
     wxString hideLabel;
     hideLabel = wxString::Format(_("Hide %s"), wxTheApp ? wxTheApp->GetAppDisplayName() : _("Application"));