This is needed for all search fields, but especially quick commands. A nickname websearch should use the search engine and then we need to be able to set search nicknames for all other search types, like commands, closed tabs, open tabs, history, bookmarks, pages actions, mail and notes.
@Gaëlle Quick commands might show all results, but it’s inefficient to navigate with alt-arrow when you already know exactly what you want to search, what command you want to issue. Nicknames for all search types is the logical next step for quick commands. Setting the priority is no good when you want to do more than just open bookmarks.