PR for duplicating items in playlist

[a10kiloham]

In my setup I need to repeat certain items at certain times and I can't seem to find an easy way to do this without uploading duplicate assets. I wrote a patch to allow duplication of items by hard linking to the asset and then managing the pointers when deletions happen so the content is not removed unless original and all duplicates gone. Deletion of original then makes the duplicate the primary hard link. Would anyone be interested in me submitting this as a PR? Because it's got an additional UI button and touches an important part, I didn't want to presume before I submitted the PR for review. My fork is here for anyone interested - https://github.com/a10kiloham/Anthias/