Linux does not handle the resize command with wide-character extended
table UTF-8. The solution did not work for W7-32bit. This is a
compromise, attempting first the preferred, previous solution and
falling back to the secondary solution.
This forces the compiler class specific features rather than borrowing
from the base class's std::string. In some cases prior to this,
wxString( std::string ) was being called rather than UTF8::operator
wxString() leading to garbled wxStrings.
Added function UTF8::wx_str() which is of great convenience also.
Implicit conversions still work as before, and hopefully more reliably.
Seth Hillbrand
Dick Hollenbeck