Qualtrics Survey Xblock

  Author fields in Studio:
   - Display Name
   - Survey ID
   - Your University
   - Link Text
   - Parameter Name for UserID

  If Parameter Name is left blank, the anonymous student id is
  omitted from the url.

  Links to an already existing Qualtrics survey.
We shouldn't be using `from_deprecated_string` in new code.

https://github.com/edx/edx-platform/wiki/Locators%3A-Developer-Notes