[QScintilla] Inconsistency about clear() and undo history

[Manuel Gómez]

Hi,

Both QsciScintilla::setText() and QTextEdit::setText() clear the 
undo/redo history but QsciScintilla::clear() doesn't, while 
QTextEdit::clear() does. Shouldn't the QScintilla version also clear the 
undo history for consistency with Qt?

Regards,
Manuel