Bug 41927 [Dialogs] Selecting in PreferenceDialog generates too many invalid entries
20030825 If you select an entry, close the dialog and then reopen it selecting anotehr entry will result in a "this page has invalid values" although you selected nothing.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
gd = new GridData(GridData.FILL_HORIZONTAL);
		gd.horizontalSpan = 2;
		separator.setLayoutData(gd);
		return composite;
	}
	/**
	 * Creates the inner page container.
	 */
	private Composite createPageContainer(Composite parent) {
		Composite result = new Composite(parent, SWT.NULL);
		result.setLayout(new PageLayout());
		return result;
	}
	/**
	 * Creates the wizard's title area.
	 *
	 * @param parent the SWT parent for the title area composite
	 * @return the created title area composite
	 */
	private Composite createTitleArea(Composite parent) {
		
		
		titleArea = new Composite(parent, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.marginHeight = 2;
		layout.marginWidth = 2;
		layout.verticalSpacing = 0;
		layout.horizontalSpacing = 0;
		layout.numColumns = 2;