fix preview label color

public/self/dataset_preview.js

@@ -432,14 +432,17 @@ function getCanvasLocationY(num){
 
 function page(current,pageSize){
   list(current,pageSize);
-  getLabelInfo(dataset_id);
-  showlabelflist();
   showfilelist();
   breadFiles();
   loadimg();
   setPage(tablePageData,pageSize);
 }
 
+
+getLabelInfo(dataset_id);
+showlabelflist();
+
+
 function nextPage(){
    var current = $('#displayPage1').text();