Implement activity tracking
For each object write activity, add a history entry shown with according objects
(from redmine: issue id 309, created on 2018-01-22tgradl)
- Relations:
- relates #316
- relates #332 (closed)
- relates #331 (closed)
For each object write activity, add a history entry shown with according objects
(from redmine: issue id 309, created on 2018-01-22tgradl)