Decomposition Tree "Explain By" field order cannot be easily amended

Hi,

The order of the Explain By fields within the Decomposition Tree visual don't match the order of the fields within the visual's settings, and cannot be easily amended when many fields are used.

This becomes apparent when you add to an existing Decomposition Tree. If I create one with fields "A", "G" and "Z", dragged onto the field list in that order, they will be correctly ordered "A" -> "G" -> "Z" for users. If I later add a new field "C" and drag it onto the field list between "A" and "G", it just gets placed at the bottom of the Explain By list on the visual itself, so the user would see "A" -> "G" -> "Z" -> "C".

This is a bit annoying when there are lots of Explain By fields that we are trying to put into a sensible order for the users, as to adjust the order of the list, we have to remove all the fields below it first, add the new one, and then re-add the old ones in the same order so that it orders correctly for the users.

Many thanks.