It fixes a few bugs and introduces these new features:
- Tasks
* made the task properties dialog adapt to the task kind
* added code to get typed manual tasks
- UML Diagrams
* extended the class items to show class attributes
* added code to load a saved UML diagram via the file browser or the project others browser
* improved the diagram layout of the Import Diagram and the Application Diagram
* added code to save and load diagrams as JSON files
* changed code to print diagrams
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