Dragging a project onto another project - should make it become a task with subtasks
We need the ability to drag a project and drop it onto another project, making the first one into a task with all its tasks becoming sub-tasks of this new task. This would make the work-flow so much easier!
Right now, to achieve the same thing, one has to manually create a new 'header' task within a project, and then make all the other tasks sub-tasks of that task.
This would facilitate the GTD methodology, as then one can easily make one of the 'current projects' move into for example a 'someday/maybe' or 'next projects' folder.