Feature Idea: Link Tasks

Sometimes you have a task that is part of two different task tree's. At the moment the best you can do is add the task to each tree, and in each task's description is the # syntax to link the the 'other' task.

It would be great if you could specifically add a task that is purely a link to another task. That is, it has no data content of it's own - it just takes you to a task in another tree.

It would need a special link icon in the tree view to tell the user that the task is just a link.