.category.0 asset name on Category deletion

[anibalsanchez]

Hi,

When I try to delete a Category, a wrong asset name is being generated ".category.0".

Please, check the following PR with an idea for a fix.

[phproberto]

Somehow I missed this @anibalsanchez. I'm sorry. I will review it today.

Thanks!

[anibalsanchez]

Thank you in advance!