Unified the AuthorPreDelete parameters
Unified the AuthorPreDelete parameters

It's not justified in this case to have extension developer handles 2 seperate cases in two seperates parameters names when we cas easily unify it.

It may be a bit slower, but it's way more comprehensive.

Picked from c06de73d0b

bauhouse/sym-todo-list,michael-e/symphony-2,jensscherbl/symphony,bauhouse/sym-todo-list,symphonycms/symphony-2,jensscherbl/symphony,symphonycms/symphony-2,michael-e/symphony-2