Added wxContextButton for non-MSW

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@19184 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/demo/wxDialog.py

@@ -57,6 +57,10 @@ def runTest(frame, nb, log):
 
     box = wxBoxSizer(wxHORIZONTAL)
 
+    if wxPlatform != "__WXMSW__":
+        btn = wxContextHelpButton(win)
+        box.Add(btn, 0, wxALIGN_CENTRE|wxALL, 5)
+
     btn = wxButton(win, wxID_OK, " OK ")
     btn.SetDefault()
     btn.SetHelpText("The OK button completes the dialog")