Merge topic 'string-json-improvements' 1eb5ea3a64 Help(string(JSON)): Clarify that some modes can have zero members/indices 06e6f1e69f string(JSON): Add STRING_ENCODE mode 15973ff247 string(JSON): Add GET_RAW mode Acked-by: Kitware Robot <kwrobot@kitware.com> Merge-request: !11516