use GetLabelText() instead of wxStripMenuCodes() to avoid stripping the part of the string after TAB

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40331 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/statbox.cpp

@@ -160,7 +160,7 @@ wxSize wxStaticBox::DoGetBestSize() const
     wxGetCharSize(GetHWND(), &cx, &cy, GetFont());
 
     int wBox;
-    GetTextExtent(wxStripMenuCodes(wxGetWindowText(m_hWnd)), &wBox, &cy);
+    GetTextExtent(GetLabelText(wxGetWindowText(m_hWnd)), &wBox, &cy);
 
     wBox += 3*cx;
     int hBox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy);