CoursePresentation 1.25 -> 1.26 "Optional Button Label" is missing
Course Presentation 1.25 contains the "optional button label" feature, which allows the editor to add a label to the "display as button" option for slide elements.
This was added by this pull request: https://github.com/h5p/h5p-course-presentation/pull/293
Course Presentation 1.26 does not contain/support that feature anymore.
When Course Presentations 1.25 are upgraded to 1.26 by the editor, it removes the labels that were present earlier.