In general you cannot delete items from a collection in WebDesk. For your attachments, I'm guessing, but I think the item is still there. The query/filter being used to display those might have a criteria on it to not display if the attributes are empty. If so, you could do the same trick with your other collection. Have a checkbox called (say) deleted, which the query uses to not display items where that checkbox is set.
In Console you can delete items from a collection, but that isn't going to be too much use for your general population of users.
The ability to delete items more cleanly would be a very welcome addition to the product.
Just like adding any other criteria really. Let's say you only wanted to display items where the quantity was >0 i.e. setting it to 0 was your trick for making it disappear. Add quantity >0 to the criteria should do that
Thanks for the feedback. Apologies as I didnt respond yesterday but i found a way to do this (not sure if is correct but give the same result)
For each of the attributes that i have on the collection, i placed the criteria "Is not null".
If i remove the values, the line dissapears
not sure if i can use also this solution?