[Feature Request] Improvements to path_track (and other entities) "Name" and "Next X" auto-incrementor

[iboates]

This feature is overall very helpful but I think two things could be improved:

• Allow it to be disabled via checkbox in the option menu, because sometimes you want to copy an entire track, and doing so messes up all the names and "next X" properties
• Change the number format to be left-padded with "0". (E.g. "track0001", "track0002", ...). Ideally, the width could be chosen via a setting, but a width of 4 is probably enough.