修复在添加图表时修复图表选项导致图表不显示的BUG

ureport2-js/src/Utils.js

@@ -310,7 +310,7 @@ export function tableToXml(context){
                         if(option.position){
                             cellXml+=` position="${option.position}"`;
                         }
-                        if(option.display){
+                        if(option.display!==undefined && option.display!==null){
                             cellXml+=` display="${option.display}"`;
                         }
                         if(option.duration){

ureport2-js/src/preview.js

@@ -221,7 +221,7 @@ window._currentPageIndex=1;
 function _refreshData(customParameters,file,totalPage,second){
     let url=window._server+"/preview/loadData?_u="+file+"";
     if(customParameters){
-        url+=customParameters;
+        url+="&"+customParameters;
     }
     if(totalPage>0){
         if(window._currentPageIndex>totalPage){