Bug 30170 [Preferences] editors preferences not stored on OK?
20030121 my eclipse hard-crashed and it seems that the 'number of open editors' preference was lost preference pages should store their values on OK. i guess the 'Editors' page forgot to do it.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
* Method declared on Dialog.
	 */
	protected Control createContents(Composite parent) {
		Control control = super.createContents(parent);
		
		selectSavedItem();
		return control;
	}
	/* (non-Javadoc)
	 * Method declared on Dialog.
	 */
	protected Control createDialogArea(Composite parent) {
		GridData gd;
		Composite composite = (Composite) super.createDialogArea(parent);
		((GridLayout) composite.getLayout()).numColumns = 2;
		((GridLayout) composite.getLayout()).horizontalSpacing = 10;
		
		createTree(composite);
		gd = new GridData(GridData.FILL_VERTICAL);
		gd.widthHint = 150;
		gd.verticalSpan = 2;
		tree.setLayoutData(gd);
		
		Composite titleComposite = new Composite(composite, SWT.NONE);
		GridLayout layout = new GridLayout();
		layout.marginHeight = 0;
		layout.marginWidth = 0;
		layout.verticalSpacing = 0;
		layout.horizontalSpacing = 0;
		titleComposite.setLayout(layout);