Transfer the `control' from ECLiPSe to the development tools, allowing the user to use the development tools GUI interactively. This predicate returns when control is returned to ECLiPSe.
Note that some features of the development tools can be triggered without interacting directly with the GUI. For example, placing a spy-point on a predicate will cause the tracer tool to pop-up when the predicate is called.
If the development tools have not been attached beforehand, the predicate tries to start them on the local machine, and attaches them.