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
{
					return null;
				}
			}
		}
		return (EditorContributor) editorContributorMap.get( targetEditorId );
	}
	/**
	 * Gets the extended element point with the specified extension name.
	 * 
	 * @param extensionName
	 *            the extension name of the extended element
	 * 
	 * @return Returns the extended element point, or null if any problem exists
	 */
	public FormPageDef getFormPageDef( String targetEditorId, String pageId )
	{
		Assert.isLegal( targetEditorId != null );
		Assert.isLegal( pageId != null );
		int index = findFormPageIndex( targetEditorId, pageId );
		if ( index != -1 )
		{
			return getFormPageDef( targetEditorId, index );
		}
		return null;
	}
	public int findFormPageIndex( String targetEditorId, String pageId )
	{
		Assert.isLegal( targetEditorId != null );
		Assert.isLegal( pageId != null );