Bug 275910 [Widgets] PaintListener on Tree not invoked when item count is 0
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
preferredWidth = Math.max(markerField.getDefaultColumnWidth(tree),
					fontMetrics.getAverageCharWidth() * 5);
		}
		return preferredWidth;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.ui.part.WorkbenchPart#createPartControl(org.eclipse.swt.widgets
	 * .Composite)
	 */
	public void createPartControl(Composite parent) {
		createViewer(parent);
		addPageAndPartSelectionListener();
		addLinkWithEditorSupport();
		addExpansionListener();
		addHelpListener();
		addSelectionListener();
		registerContextMenu();
		initDragAndDrop();
		getSite().setSelectionProvider(viewer);
		IUndoContext undoContext= getUndoContext();
		undoAction= new UndoActionHandler(getSite(), undoContext);
		undoAction.setActionDefinitionId(IWorkbenchCommandConstants.EDIT_UNDO);
		redoAction= new RedoActionHandler(getSite(), undoContext);
		redoAction.setActionDefinitionId(IWorkbenchCommandConstants.EDIT_REDO);
		getViewSite().getActionBars().setGlobalActionHandler(ActionFactory.UNDO.getId(), undoAction);
		getViewSite().getActionBars().setGlobalActionHandler(ActionFactory.REDO.getId(), redoAction);
		startView();