Descriptions added for test modes
Merge branch 'guiRevision' of https://github.com/klassebe/klasse-wp-poll-survey into guiRevision

# By Koen Gabriëls
# Via Koen Gabriëls
* 'guiRevision' of https://github.com/klassebe/klasse-wp-poll-survey:
  Adds all unit tests to test form validation for new poll version