Merge branch 'release/7.x-0.39' into develop
Add relations to work one elements if they exists
Add unit test
US 1291: Only one context for material type
Minor documentation
US 1291 : Comment added about lack of context on translations
undo commit for BUG17207
BUG 17207: Remove test -> moved to ting_client
check on object type before calling class method
Tagging version 7.x-0.40
Merge branch 'release/7.x-0.40'