/**
* initialize the moveUpButton
*/
private void initMoveUpButton() {
// move up button
MoveUpSelectionTableAction moveUpAction = new MoveUpSelectionTableAction(mainTable);
moveUpButton.setAction(moveUpAction);
addButtonToButtonPanel(moveUpButton);
addToMainTableKeyBindings(moveUpAction);
popupMenu.add(new JMenuItem(moveUpAction));
}