Highlight selected row(s)
            and put the result of a muti_row selection
            in the list "self.selected_row_list".

def on_table_row_click(self, row, item):
        ''' Highlight selected row(s)
            and put the result of a muti_row selection
            in the list "self.selected_row_list".
        '''
        if not self.multi_selection_enabled:
            self.remove_selection()
        if row not in self.selected_row_list:
            self.selected_row_list.append(row)
            row.style['outline'] = "2px dotted blue"
        return (row, item)