Bludit 3.15: Deleting a page keeps the image folder

[RalfKerkhoff]

Steps to reproduce:
Create a new page and upload a cover image.
An new folder with an id is created in: /bl-content/uploads/pages
The folder contains the image and in a subfolder the thumbnail

When deleting the page Bludit should also delete the folder with the associated image (image and thumb).
This does not happen with Bludit 3.15.

Tested this on my live site and with a fresh install (no other plugins installed) for testing purpose.
In both installations the image folder (and the images) are not deleted when deleting the page.

Cheers
Ralf