Feature summary (what you would like to be able to do and where):

The "Add a template" feature in VisualEditor, in the search results includes subpages of templates that are not to be usedd in pages edited with VE. Common examples are templates only used in templates as components, and template subpages like /doc, /sandbox, /testcases, /styles.css. These should not be suggested by the search to be used on other pages.

Allow the wikis to configure which pages in the template namespace should not be included in the VE results.

Benefits (why should this be implemented?):

• Reduced risk of users adding templates designed not to be added in articles (as well as other pages edited in VE)
• The search result list would be more useful - it would not give useless suggestions