Convert multiple position costume into 1

Suggestions
1

Imported from legacy Flarum.
Original author: Erfa79 (Flarum #308)

Hello, i would like to suggest an option to convert any costumes that take multiple position such as odin mask (19924) (mid and low position) able to convert to only take 1 position.

  1. convert any multiple position costume into 1 position
  2. able to choose on what position to take its place.

thx