Tags instead of Single option while adding a coin to collection

This would be my humble suggestion.

At present, collections are sorted by using a single option. 

For example, I have a collection named "New Zealand", and another named "Native and Tribal art". So, while adding this coin: 

N#3913

I want it to be visible when I select either of the two collections. But at present, it is only possible to add the coin in any one of the 2 collections without increasing the number count of my collection. 

I think it would be nice if the option of "collection" is in the form of tags.

Thank you

You can “tag” them in your private/public comments and filter them with the 'My comment' field (HERE) too.

Hello,

I'm closing this discussion as the idea is already tracked at https://en.numista.com/forum/topic101564.html