Changing a page to a folder

So here's the case: We have created a page for a meeting. During the meeting, we decide to add some material/workshop a specific issue. Now the problem is that we cannot add this page under the meeting page. 

Of course, we can create a new folder and add both of the pages under it. But would be more convenient to be able to change the previous page to a folder, and add the new subject page under that. 

I clearly understand your use case, but I think this is still a bit special case. Also a difficult to name: it is not about "changing a page to a folder", more like "create a new folder and move this page inside it". I fear that for most users this would be a bit confusing feature.

I'm moving this to "currently not planned", but happy to review this later again.