Wikimedia Bugzilla is closed!

Usually, DEFAULTSORT contents need only a little re-arranging or capitalization changes.  If the name is long or unfamiliar, it may be difficult to type it to make these relatively minor changes.  It would be nice to pre-fill the box with the page title.

But if VisualEditor simply fills in the box whenever you open the Page settings menu, then we'll get a lot of errors (because people won't notice that it needs to be updated).

Possible solution:  Add a button next to the DEFAULTSORT item to insert the current page title as text that the editor can then change as needed.