Collection Manager - move cards from one collection to another

[Ridazinator]

The Idea is to add a feature that makes it possible to move a card to a different collection. For example, in the collection editor, each card should have a button which opens a small popup. In that popup i can declare how many copies of the card i want to move and into which collection. The current way is to delete a card in one collection and readd it into another collection, which is kinda bad.
It should also be possible to move multiple cards at once.