Bug 131258 NewOdaDataSet is created when drop dataset from data explorer into layout in library
Details: NewOdaDataSet is created when drop dataset from data explorer into layout in library Setp: 1.New a library 2.Create a datasource and dataset 3.Drop dataset from Actual result: A new dataset named NewOdaDataSet is created. Exception result: The dataset is unnecessary to be created
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/palette/BasePaletteFactory.java
{
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.designer.internal.ui.editors.schematic.tools.IToolHandleExtends#preHandleMouseDown()
		 */
		public boolean preHandleMouseUp( )
		{
			if ( getRequest( ).getNewObjectType( ) instanceof DataSetHandle )
			{
				try
				{
					
					Object newObj = getRequest( ).getNewObject( );
					if ( newObj instanceof Object[]
							&& ( (Object[]) newObj ).length > 0 )
					{
						newObj = ( (Object[]) newObj )[0];
					}
					DesignElementHandle elementHandle = (DesignElementHandle) newObj;
					if ( elementHandle.getRoot( ) instanceof LibraryHandle )
					{
						ModuleHandle moduleHandle = SessionHandleAdapter.getInstance( )
								.getReportDesignHandle( );
						LibraryHandle library = (LibraryHandle) elementHandle.getRoot( );
						try
						{
							if ( UIUtil.includeLibrary( moduleHandle, library ) )
							{