select all text initially in the control (part of patch 649438)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@21821 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/textdlgg.cpp

@@ -114,6 +114,7 @@ wxTextEntryDialog::wxTextEntryDialog(wxWindow *parent,
 
     Centre( wxBOTH );
 
+    m_textctrl->SetSelection(-1, -1);
     m_textctrl->SetFocus();
 
     wxEndBusyCursor();