How to sort sub points in a block?

This seems like a very simple question / function, but I could not find it in the forum. And so I’m not sure if this is a question for help, or a feature request: how can I sort the sub points of a block ?

For example, I’d like to sort:

  • top node
    – c
    – a
    – b

alphabetically into:

  • top node
    – a
    – b
    – c

Is this possible ? If not, can it be made possible ?