old ACTION_EVENT cannot be generated from data in new ActionEvent class

A new event model is being introduced into 1.1, however we need to support the
old event model for backwards compatibility.

This means that we need to be able to easily convert new style events into
their old equivelents.

Currently, with the old Event.ACTION_EVENT, this cannot be done because the
new ActionEvent class is missing some parameters to enable the conversion to
the old event.