Remove modal in checkUploadFile()

web/src/FileTree.js

@@ -103,12 +103,14 @@ class FileTree extends React.Component {
   }
 
   checkUploadFile(info) {
+    if (Conf.EnableExtraPages) {
       for (let i = 0; i < info.fileList.length; i++) {
         const filename = info.fileList[i].name;
         if (this.getCacheApp(filename) === "" && filename.endsWith(".txt")) {
           return true;
         }
       }
+    }
     return false;
   }