Fixed issues
- Improved general stability.
- The import of some MS Project XML files exported from Primavera lead to an error if they contained invalid assignments.
- Under macOS 10.11 it was not possible to move several boxes at once with the mouse in the net plan view.
- On resources in parent projects, costs from subprojects were not always included.
- Scrolling in the activity dependency inspector did not work correctly if an activity had many dependencies.
