Bug 130495 Get rid of SessionHandleAdapter
Now, we use SessionHandleAdapter to keep current active report deisng. That's a bad practive for editor swith and rebuild will cuase lots of problmes. Need find way to replace it.
UI/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java
setInput( getActivePageInstance( ).getEditorInput( ) );
		
		IReportProvider provider = EditorUtil.getReportProvider( this,
				getEditorInput( ) );
		if ( provider != null )
		{
			setPartName( provider.getInputPath( getEditorInput( ) )
					.lastSegment( ) );
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.part.EditorPart#isSaveAsAllowed()
	 */
	public boolean isSaveAsAllowed( )
	{
		return getActivePageInstance( ).isSaveAsAllowed( );
	}