Don't adjust menu item positions for title for menubar menus in wxMSW.

The code in wxMSW menu code which accounted for the extra items used to show
popup menu title has become incorrect since the changes of r66178 as now the
non-popup menus have titles as well.

Correct the check to only do the adjustment for the popup menus.

Closes #12922.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66845 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/menu.cpp

@@ -397,8 +397,8 @@ bool wxMenu::DoInsertOrAppend(wxMenuItem *pItem, size_t pos)
         pos = GetMenuItemCount() - 1;
     }
 
-    // adjust position to account for the title, if any
-    if ( !m_title.empty() )
+    // adjust position to account for the title of a popup menu, if any
+    if ( !GetMenuBar() && !m_title.empty() )
         pos += 2; // for the title itself and its separator
 
     BOOL ok = false;