Method addColumns

src/frontend/matrix/MatrixView.cpp:902–904

############################# column related slots ########################### ! Append as many columns as are selected. */

  Append as many columns as are selected.
*/
void MatrixView::addColumns() {
	m_matrix->appendColumns(selectedColumnCount(false));
}

void MatrixView::insertEmptyColumns() {
	int first = firstSelectedColumn();