Wikimedia Bugzilla is closed!

Created attachment 10846 [details]
patch (for latest SVN) to implement $wgSelectCategoryToplevelAllowed

The attached patch adds the config option $wgSelectCategoryToplevelAllowed.

If you set it to false, the checkbox for the top-level category will be hidden, so users can only select sub-categories.

The reason for implementing this is that it doesn't make sense to add a page to the top-level category in many cases. 

For example, I have the top-level category "pictures" for the File: namespace, and (nearly) all files would fit into this category. This means it doesn't make sense to categorize all uploaded files as "pictures". Instead, the users can/have to select one or more sub-category (for example "cat pictures") that matches better.