Submitting a macro form will add a comma to the parameters that bind pickers allowing multiple options

Prerequisites:

Have a macro that has a parameter which is binding a picker that supports multiple values such as Roadmap Application, PDF Macro

Steps to reproduce:

**1. Go to/Create a page

2. In the WYSIWYG editor, add the aforementioned macro

3. Populate the parameter that uses the picker allowing multiple values with at least one entry

4. Click submit

5. Edit the macro

Expected:

**The form looks the same as before you clicked submit.

Actual:

The value added using the picker has an comma at the end.

Submitting the form again, will add another comma.

The issue is also described here.