LDEV-1382: The content repository needs the user details from the session to function properly, so it was throwing an exception on import. I've added some code to dummy up the session but it needs to be tested.
LDEV-1382: If the content repository is called from a webservice, the HttpSession won't exist, so it was throwing a null pointer error. Now it throws a meaningful error.
LDEV-1285 Added two options (buttons) for Optional to the Toolbar. Ready to now configure Optional Activity (canvas class) to manage Sequences within Optionals.
LDEV-1132 Improved robustness of drawing branching activities and fixed problem with activities disappearing on drag-drop to canvas after clearing canvas.
