Consistent indentation

Scribes offers options to change tabs to spaces, or vice versa, in the existing text. But after switching to spaces, new indentation it inserts will still be tabs. Also, when I open an existing (Python) file that uses spaces for indentation, Scribes will indent new lines I add with tabs.

Is there a way to configure the default indentation method? Or, better, could we have a 'sticky' indentation, so that when you replace tabs with spaces (or open a file which uses spaces), it remembers that and will use spaces on new lines.