Method undo

src/backend/core/abstractcolumncommands.cpp:64–67

* \brief Undo the command */

 * \brief Undo the command
 */
void AbstractColumnClearMasksCmd::undo() {
	m_col->m_masking = m_masking;
	finalize();
}

void AbstractColumnClearMasksCmd::finalize() const {
	// TODO: implement AbstractColumn::setChanged() instead of these two calls,