Resizes the columns to the contents based on the user preferences.

def smartResizeColumnsToContents( self ):
        """
        Resizes the columns to the contents based on the user preferences.
        """
        self.blockSignals(True)
        self.setUpdatesEnabled(False)
        
        header = self.header()
        header.blockSignals(True)
        
        columns = range(self.columnCount())
        sizes = [self.columnWidth(c) for c in columns]
        header.resizeSections(header.ResizeToContents)
        
        for col in columns:
            width = self.columnWidth(col)
            if ( width < sizes[col] ):
                self.setColumnWidth(col, sizes[col])
        
        header.blockSignals(False)
        
        self.setUpdatesEnabled(True)
        self.blockSignals(False)