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
if (cutAction != null) {
                setEnabled(cutAction.isEnabled());
                return;
            }
            setEnabled(false);
        }
    }
    private class CopyActionHandler extends Action {
        protected CopyActionHandler() {
            super(IDEWorkbenchMessages.Copy);
            setId("TextCopyActionHandler");
            setEnabled(false);
            PlatformUI.getWorkbench().getHelpSystem().setHelp(this,
					IIDEHelpContextIds.TEXT_COPY_ACTION);
        }
        public void runWithEvent(Event event) {
            if (activeTextControl != null && !activeTextControl.isDisposed()) {
                activeTextControl.copy();
                updateActionsEnableState();
                return;
            }
            if (copyAction != null) {
                copyAction.runWithEvent(event);
                return;
            }
        }
        /**
         * Update the state.
         */
        public void updateEnabledState() {