Bug 241208 [Markers] [Problems View] Restore Defaults is not working in the preferences
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerPreferencesDialog.java
nonVisibleLabelData.left = new FormAttachment(55, 0);
		nonVisibleLabelData.top = new FormAttachment(0);
		nonVisibleLabel.setLayoutData(nonVisibleLabelData);
		final ListViewer visibleViewer = new ListViewer(columnsComposite,
				SWT.BORDER);
		FormData visibleViewerData = new FormData();
		visibleViewerData.right = new FormAttachment(visibleItemsLabel, 0,
				SWT.RIGHT);
		visibleViewerData.left = new FormAttachment(visibleItemsLabel, 0,
				SWT.LEFT);
		visibleViewerData.top = new FormAttachment(visibleItemsLabel,
				IDialogConstants.BUTTON_MARGIN);
		visibleViewerData.bottom = new FormAttachment(100, rightMargin);
		visibleViewerData.height = convertHeightInCharsToPixels(15);
		visibleViewerData.width = convertWidthInCharsToPixels(25);
		visibleViewer.getControl().setLayoutData(visibleViewerData);
		visibleViewer.setContentProvider(new IStructuredContentProvider() {
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
			 */
			public Object[] getElements(Object inputElement) {
				return visible.toArray();
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
			 */