[[Special:Allpages]] allows to search pages by first letters or first digits. It's very fine and useful. But it doesn't show "non-existing" categories...
Should it be possible, in [[Special:Categories]], to add a form which would also allow to search by first letters or first digits?
Explanation: on big projects, with thousands of categories, it takes a lot of time to find some "red" categories (used in articles or other pages, but without creation of category's page).
This new form should help contributors to create missing pages for some categories... or to choose to remove, in articles using those "red" categories, [[Category:foo]] ou to choose another (already existing) category.
On big projects, you have sometimes, to click a lot of times on link (500 next) before you find the "red" categories you are looking for...
I apologize if there is already any bug report about this problem.