Adapt help for Model Markers
- model_markers_view.html has to be adapted
- New pictures to replace old gef/swt screenshots in all pages
(from redmine: issue id 3947, created on 2020-03-17, closed on 2020-04-06)
- Relations:
- parent #3866 (closed)
(from redmine: issue id 3947, created on 2020-03-17, closed on 2020-04-06)