Drop Down Menu "Priority"

Hey there! 

I don't know how simple it'd be to do but the idea in itself is pretty simple, it's also not that big of a deal.

When you search items in the Trading Center and then you want to search for another item, right now you have to either scroll back down or type the name of the  item again and click it to untick it as a filter. When there's multiple items selected, it gets a bit long. I feel like it'd be more streamlined if whatever you ticked appeared at the top of the list next time you open the drop down menu.

Maybe I just like doing things fast...

Support! Either that, or add a Deselect All button like in some of the wolf search dropdowns. Having to type just to remove something is pretty frustrating.