This new extension allows people to configure a set of available "types" for

comments, and either allow or require users to set the type of each comment.

Once set, the comment type is visible next to each comment in the review, and

can be retrieved via the extra_data field in the API.

Added, removed, and edited comment types in the extension's configuration

  interface. Verified that the list was always saved correctly.
Tested that the configured types showed up properly in the comment dialog and

  review dialog. Checked that when 'require ...' was unchecked there was an

  empty option listed first, and that the visibility flag was handled

  correctly.
Tested opening the comment dialog and review dialog for existing comments

  that didn't have a type set, and that there was an empty option preselected.
Tested saving the type from the comment dialog and review dialog. Checked

  that it was always persisted correctly. Tested that the initial selection was

  correct when opening comments with a saved type.
Tested the display of the type in the reviews page.