Add functionality for editing model properties

[kingcole]

No description provided.

[deinhofer]

@kingcole please specify what you mean. Do you refer to edit e.g. the model description field?

[kingcole]

exactly - in the "Edit"-Tab there are buttons for "Edit Model ID" and "Show Model Description" (with subtitle "Model Properties") - they are greyed out, because they have no function yet - this is about adding this functionality

[klues]

As just discussed in email it would make sense to show the model description somewhere more promient on opening a model. In the menu it gets lost somehow.