ORD 2019.1 - Clean old drawing model name

In Openroads designer:

- you create a drawing model for profile or section annotation, name it ex: "profile 1"

- delete the model

- It's now impossible to use the name "profile 1" try it the software will name your model an other name.  And there is no way to clean the "list" of old named models.

Please fix this or at least explain why we cannot do this.