PageDesignerActionConstants.addStandardActionGroups(menuMgr1);
// TODO: Run/Debug?
// insert ElementEdit contributed menu items
final ContainerActionGroup containerActionGroup =
new ContainerActionGroup();
ActionContext context = new ActionContext(_viewer
.getSelection());
context.setInput(_viewer);
containerActionGroup.setContext(context);
containerActionGroup.fillContextMenu(menuMgr1);
containerActionGroup.setContext(null);
// TODO: TableActionGroup
// if on a text context, (instead of a ElementEditPart),
// add text styling actions