Bug 132506 [Regression][Linux WS]Error on operation buttom in layout tab
Details: [Regression]Error on operation buttom in layout tab Setp: When I new a report design or template, it will be appear on preview state, but layout state.
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/internal/ui/extension/EditorContributorManager.java
{
				FormPageDef page = (FormPageDef) itor.next( );
				if ( page.id.equals( id ) )
				{
					return page;
				}
			}
			return null;
		}
	}
	private HashMap editorContributorMap;
	private static EditorContributorManager instance = null;
	private EditorContributorManager( )
	{
	}
	public static EditorContributorManager getInstance( )
	{
		if ( instance == null )
		{
			synchronized ( ExtensionPointManager.class )
			{
				if ( instance == null )
				{
					instance = new EditorContributorManager( );
				}
			}
		}
		return instance;
	}
	/**