Change all void references to delete in interface

To the end user, "voiding" is really "deleting". Because it hides it from view. All references to "Void" in the interface should be changed to "Delete".

At the same time, any references to "Delete" or "Purge" should be changed to "Delete Forever". Behind the scenses this is actually removing the row from the DB and never to be seen again.

Hopefully all of these changes can be in the spring messages.properties files and jsp code. However, there might be a few references in the api code as well that need changing.