When a template has a very long list of parameters and the editor needs to select the right parameter from the "Select target field" drop-down, this is quite hard.

It would be more notable to have the list sorted, or to have a search box that looks for a parameter.

For example, when translating an article about a person and inserting {{Infobox person}}, it is hard to find the "Awards" parameter, because it's buried deep down in the list, and the list is not sorted. Having something like an auto-complete search box to look for the parameters could help with this, or maybe to find another design solution.