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I am looking for a name of one specific UI element. I have unsuccessful tried to identify it before but this attempt failed.
What I am looking for is an n-to-n selector where items move between two states. Lets say you have two buckets (states), one on the left, one on the right. There are multiple items in the left bucket and you can move them to the right bucket and back.
What is the name of this element? How is it different from normal list where you can select multiple items?