Bug 153038 NPE when delete master page content in old report design.
UI/org.eclipse.birt.report.designer.ui.editors.schematic/src/org/eclipse/birt/report/designer/internal/ui/editors/layout/ReportEditorWithPalette.java
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.AddGroupAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.AddStyleAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.CopyPartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.CreatePlaceHolderPartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.CutPartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.DeleteColumnAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.DeleteListGroupAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.DeleteRowAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.DeleteTableGroupAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.EditBindingAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.ImportCSSStylePartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.IncludeDetailAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.IncludeFooterAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.IncludeHeaderAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertColumnLeftAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertColumnRightAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertListGroupAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertRowAboveAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertRowBelowAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.InsertTableGroupAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.MergeAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.PastePartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.RevertToReportItemPartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.RevertToTemplatePartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.SelectColumnAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.SelectRowAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.SplitAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.actions.UseLibraryPartAction;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.editparts.GraphicalPartFactory;
import org.eclipse.birt.report.designer.internal.ui.editors.schematic.editparts.ReportRootEditPart;