Deleting a newsletter should unlink it from its main-page

Wikimedia

This task is about the Newsletter extension. You will have to install the same.

Steps to reproduce:

Create a Newsletter:Foo with main page as Bar
Delete the Newsletter:Foo
Create a new Newsletter:FooBar, and try to assign it with the main page Bar . You would see an error message there.

Probably, when there is an undelete happening, a message can shoot up saying that The main page of this newsletter is being used already.

Filip