Two actions used to maintain a 'featuring' list in the Title or Artist fields. The source of the list can be in the Title and/or Artist fields.
Actions: Featuring Manipultion - Title
Actions: Featuring Manipultion - Artist
2014-10-07 First release.
2015-02-09 Modified to guarantee uniqueness of any one given artist name. More bracketing options.
2016-02-21 Removed with as a keyword in the Title field as there are far to many false positives.
2016-07-11 Removed with as a keyword in the Artist field as evidently there were issues here as well. It can always be manually added.
2017-05-03 Added second action producing the list in Artist.