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.
Create dialog and code to allow legacy schematic symbols to be remapped
from the old library path look up method to the new symbol library table
method by using the following steps:
1) Create a project symbol library table containing all of the symbol
libraries defined in the old library look up list not found in the
global symbol library table.
2) Map each symbol to the correct symbol in the symbol library table
if possible.
Recreate library link to symbols so look up method can be converted to
symbol library table properly.
Add function to SCH_COMPONENT to link library symbols using the symbol
library table.