added wxDialog::GetParentForModalDialog() and use it to try to always create modal dialogs with a parent (slightly modified patch 1702962)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@45588 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/generic/fdrepdlg.cpp

@@ -87,6 +87,8 @@ bool wxGenericFindReplaceDialog::Create(wxWindow *parent,
                                         const wxString& title,
                                         int style)
 {
+    parent = GetParentForModalDialog(parent);
+
     if ( !wxDialog::Create(parent, wxID_ANY, title,
                            wxDefaultPosition, wxDefaultSize,
                            wxDEFAULT_DIALOG_STYLE | wxRESIZE_BORDER