Bug 239518 [Contributions] Fix up TextActionHandler's handling of Delete to use Text.insert
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/actions/TextActionHandler.java
private DeleteActionHandler textDeleteAction = new DeleteActionHandler();
    private CutActionHandler textCutAction = new CutActionHandler();
    private CopyActionHandler textCopyAction = new CopyActionHandler();
    private PasteActionHandler textPasteAction = new PasteActionHandler();
    private SelectAllActionHandler textSelectAllAction = new SelectAllActionHandler();
    private IAction deleteAction;
    private IAction cutAction;
    private IAction copyAction;
    private IAction pasteAction;
    private IAction selectAllAction;
    private IPropertyChangeListener deleteActionListener = new PropertyChangeListener(
            textDeleteAction);
    private IPropertyChangeListener cutActionListener = new PropertyChangeListener(
            textCutAction);
    private IPropertyChangeListener copyActionListener = new PropertyChangeListener(
            textCopyAction);
    private IPropertyChangeListener pasteActionListener = new PropertyChangeListener(
            textPasteAction);
    private IPropertyChangeListener selectAllActionListener = new PropertyChangeListener(