With the fix to i74049 (CWS tl82) Math is now able to handle 32 bit
characters properly in the symbol catalog.
Since this was regarded ro be more of a bugfix than a feature there is
no spec for it. The new behavior is just listed in the issue. Please
note the code-position of the symbol is now used as a default name for
the symbol, which makes much easier to browse for a specific Unicode