Changed listbox field to pointer to allow use of platform-specific subclass. Added new listbox initialisation parameters.
Changed listbox field to pointer to allow use of platform-specific
subclass.
Added new listbox initialisation parameters.

R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone,R1dO/scintilla_clone