Comment 1 for bug 1808706

@Seth Is the "first free number" thing even useful? How often do people do that rather than writing in their own numbers? I feel like perhaps just removing this option makes more sense. Otherwise it's not clear:

* First available number: if you have pads "1, 4, 6" already, is the first available number 2 or 7?
* If 2: do you skip all existing numbers (so the new items here are "2, 3, 5, 7".

Finding the "highest" existing pad number is quite a pain, especially if you have pads that don't fit an alphabet.