Bad FullName when some member is assigned to a named object

[Víctor de Buen Remiro]

When some member is assigned to a named object, FullName becomes corrupted. For example, correct FullName should be

Code relExpTerOutput::_.explicativeTerm::_.input::_.variable::Copy

but is

Code relExpTerOutput::expTer::_.input::var20::Copy

This could be just an stetic problem in TolBase Inspector but, when root NameBlock relExpTerOutput is a global object, then TolBase Inspector returns an error when you try to view the list of functions of type returned by the method, due to it can't find the final method with wrong FullName.

[Víctor de Buen Remiro]

(In [1188]) Adding argument BText memberName to method RebuildFullNameDeep in order to set correct global FullName to deep members.
Fixes #716