LPS-42601

Eudaldo, can you do an additional review on this ticket. I'm not sure what the correct behavior should be.

Before this change, it was possible to search for an article in the Control Panel even if the "Searchable" option is not selected. However, after this change, this is no longer possible. However, this new behavior is consistent with the behavior in Blogs, MB, and Wiki (see LPS-43008 for more details)