DVE: Support nested functions

For the complete path, it's here : I need to have a list with the function elements, so that I can use {{ function|join:"::" }} as well as {{ function|last }} to only have the function name

I would then replace by: IV_{{ function|last }} : system InterfaceView::IV::{{ function|join:"::"}}::{{ function|last }}.others { Taste::Functionname => "{{ function|last }}"; }