Bug 1854 - Un-warned export file overwrite danger in 2.2.2 Chains and 2.3.0 MacrosWindow

Now we add a suffix of 001, 002 and so on up to 100.  Then fall back to prompting.

src/BatchCommands.cpp

@@ -558,7 +558,6 @@ wxString MacroCommands::BuildCleanFileName(const wxString &fileName, const wxStr
    cleanedName += wxFileName::GetPathSeparator();
    cleanedName += justName;
    cleanedName += extension;
-   wxGetApp().AddFileToHistory(cleanedName);
 
    return cleanedName;
 }