Add possibility to duplicate a therapy stub

[pmeng]

In the therapy stubs list I want a button called "Duplicate". In the edit therapy stub view I want a button called "Duplicate" and another button called "Save and Duplicate"

This button shall create a new therapy stub and copy the contents of the original therapy stub into the fields of the new therapy stub. It should be shown in the edit therapy stub view so the user can adapt the content and save it then.

When selecting "Save and Duplicate" it shall save the therapy stub and then use it as a template for a new therapy stub (so executing the functions "Save" and "Duplicate" sequentially)

[pmeng]

Another Request in the same direction: Make a button in the therapy schemes next to the therapy stub (can be a small symbol like ) that opens the therapy stub (either as edit mode of the therapy stub or alreeady duplicated depending on the clicked symbol) in a new windows/tab

Icon example for duplicate: Icon example for edit:

[Mahmoudnaoum]

Sure, I will work on adding this too