Any non-literal mappings made within a single assignment nearly always show up as (query)=(exp).  These are impossible
to differentiate in the BPEL Logical View within the Navigator.  We need to provide two things:

* numbered assignments - show an incremental count on the order that the assignments occur.  This is useful where we
have large numbers of mappings and are trying to rearrange the order.

* detailed query text - perhaps show the XPath used for copy from and to (on hover) and a shorthand form reading from
right to left if this is too cluttered e.g. 

<from>$MortgageApplicationOperationIn.input/amountRequested</from>
                <to>$ApproveIn.parameters/amountRequested</to>

shows as = ...amountRequested=...amountRequested