Simplifying Action attributes

We have an attribute set Control Common:


 Common, Appearance, Navigation, UI Common, Single Item Binding


which appears on all controls.


Actions also have a common set, Action Common, which currently only 
contains 


 if (boolean Expression), while (boolean Expression), iterate 
(node-sequence Expression)


but all Actions have as attributes


 Common, Events, Action Common,


So I am moving Common, Events into Action Common, to simplify the 
specification of actions.


Steven