Merge tag 'v3.52.1' into develop

bumping version to build clean package v3.52.1

# gpg: Signature made Sat Aug 29 11:44:29 2020 CEST
# gpg:                using RSA key 149325FD15904E9C4EB89E95E81444E9CE1F695D
# gpg: Good signature from "Rick van Hattem <wolph@wol.ph>" [ultimate]
# gpg:                 aka "[jpeg image of size 9662]" [ultimate]

Author: wolph