When extracting pages as images from a document (extract_images) it would be useful if the appended page numbers had leading zeros so they are ordered automatically in the output directory.

If you have more than 9 pages ordering gets lost:

filename_1
filename_10
filename_11
filename_2
etc…

but with leading zeros:

filename_01
filename_02
…

Just a small thing that would help with working with the files after extraction