As a user, warn when creating a page with the same name as a page in another space

Problem Definition

Currently Confluence allows you to create a page with the same name as a page in ANOTHER space (not the same space)

Some users would like the option to be warned in case they are creating a page that has the same name as another page on the instance.

Suggested Solution

Provide an ability to switch on a setting that will warn the user in case they are creating a page with the same name.

We wouldn't want this to be on by default or for all users, it should be an optional setting.