Bug 155766 [Regression]Preview will not refresh the modify in design report
Details: Preview will not refresh the modify in design report Step: 1.New a report design. 2.New a label and input label1. 3.Preview. 4.Switch to Layout and modify the content of label as label2. 5.Preview. Actual result: It preview as "label1" twice. Exception result: Preview "label2" at the second time
viewer/org.eclipse.birt.report.viewer/src/org/eclipse/birt/report/viewer/utilities/WebViewer.java
{
					rtl = true;
					break;
				}
			}
		}
		if ( "true".equalsIgnoreCase( svgFlag ) ) 
		{
			bSVGFlag = true;
		}
		String masterPageContent = ViewerPlugin.getDefault( )
				.getPluginPreferences( ).getString( MASTER_PAGE_CONTENT );
		boolean bMasterPageContent = true;
		if ( "false".equalsIgnoreCase( masterPageContent ) ) 
		{
			bMasterPageContent = false;
		}
		
		String encodedResourceFolder = null;
		try
		{
			if ( resourceFolder != null )
				encodedResourceFolder = URLEncoder.encode( resourceFolder,
						"utf-8" ); 
		}
		catch ( UnsupportedEncodingException e )
		{
			
		}
		if ( encodedResourceFolder == null )