#100 Nested Class Name update problem

[Eric Lambart]

When a nested class which appears as a subclass of
another class is renamed, the new name is not updated
in the tree below the superclass.

Additionally, the I%ClsIndx indices for any super- and
sub-classes of the nested class are not updated to
reflect the name change.

The fix I've developed requires a new method,
ESI$Class.NCRenamed, and the addition of one line to
ESI$Class.RenameNestedClass

This may not be the optimal fix in terms of speed or
efficiency, but it appears to work perfectly.

I will attach exports of both methods.

[Eric Lambart]

Code for ESI$Class.NCRenamed method

[Eric Lambart]

New version of ESI$Class.RenameNestedClass

[Eric Lambart]

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refer also to ESI bug #583989