If you have URL Lists from e.g. Firebog Blocklist Collection it makes sense.
If the Lists are Randomly in Piholes Filter Lists and the 3rd one in the List changes the URL Adress you have to delete all other Lists after the 3rd one to change the 3rd`s URL and then add them again.
It sounds like you are just wanting to keep your lists in some 'visual order'? As RD states, their order there has no impact on functionality. The domains in the lists all get added to the database and used that way, i.e. all combined.
The lists and their contents, or order of the contents are not something Pi-hole is responsible for. They are just lists with domains that Pi-hole uses for ad blocking.
I suppose if you really wanted the lists in a particular order, you could write a script of some sort. Not clear why you would need such a thing, but who knows.
I would be am concerned that users would assume that moving lists means the lists have some kind of order or hierarchy. Being able to move a list drag-n-drop means that a list higher in the display has a higher priority.
----Personal Opinion----
I understand that people will use Pi-hole for what ever their needs are but if you are at a point that you need to manage a large collection of lists, well, maybe you don't need that many lists?
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