[FEATURE REQUEST] Capture batch descriptors so they can be used in filename masks

[the-liquid-metal]

ArrowDL already able to recognize batch descriptors pattern. It would be great if ArrowDL able to recognize filename masks based on descriptor pattern, for example:
url: https://github.com/setvisible[001:100]/ArrowDL[1:10]/issues/new
tags: *descriptor:1* for [001:100], *descriptor:2* for [1:10]
mask: folder1/*descriptor:1*/image-*descriptor:2*.jpg

Because of the current limitation, i have to write mask folder1/image-*flatsubdirs*.jpg, and than use file renaming app.