Bug 169696 [Preferences] EncodingFieldEditor.setEnabled(false) has no effect
3.3 M4 Calling EncodingFieldEditor.setEnabled(false, parent) has no effect i.e. the control is still enabled.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/dialogs/AbstractEncodingFieldEditor.java
defaultEncodingButton.setLayoutData(data);
		defaultEncodingButton.addSelectionListener(buttonListener);
		defaultEncodingButton.setFont(font);
		otherEncodingButton = new Button(group, SWT.RADIO);
		otherEncodingButton.setText(IDEWorkbenchMessages.WorkbenchPreference_otherEncoding);
		otherEncodingButton.addSelectionListener(buttonListener);
		otherEncodingButton.setFont(font);
		encodingCombo = new Combo(group, SWT.NONE);
		data = new GridData();
		encodingCombo.setFont(font);
		encodingCombo.setLayoutData(data);
		encodingCombo.addSelectionListener(new SelectionAdapter(){
			/* (non-Javadoc)
			 * @see org.eclipse.swt.events.SelectionListener#widgetSelected(org.eclipse.swt.events.SelectionEvent)
			 */
			public void widgetSelected(SelectionEvent e) {
				updateValidState();
			}
		});
		encodingCombo.addKeyListener(new KeyAdapter(){
			/* (non-Javadoc)
			 * @see org.eclipse.swt.events.KeyListener#keyReleased(org.eclipse.swt.events.KeyEvent)
			 */
			public void keyReleased(KeyEvent e) {
				updateValidState();
			}
		});
		return group;
	}
	/**