Fix open and close directory sidebar bug

app/assets/javascripts/repo/repo_helper.js

@@ -84,10 +84,11 @@ const RepoHelper = {
 
   mergeNewListToOldList(newList, oldList, inDirectory, indexOfFile) {
     newList.forEach((newFile) => {
+      const fileIndex = indexOfFile + 1;
       const file = newFile;
       file.level = inDirectory.level + 1;
 
-      oldList.splice(indexOfFile, 0, file);
+      oldList.splice(fileIndex, 0, file);
     });
 
     return oldList;

app/assets/javascripts/repo/repo_sidebar.js

@@ -44,10 +44,13 @@ export default class RepoSidebar {
           let url = '';
           let file = clickedFile;
           if (typeof file === 'object') {
-            if (file.type === 'tree' && file.opened) file = Store.removeChildFilesOfTree(file);
+            if (file.type === 'tree' && file.opened) {
+              file = Store.removeChildFilesOfTree(file);
+            } else {
               url = file.url;
               Service.url = url;
               Helper.getContent(file);
+            }
           } else if (typeof file === 'string') {
             // go back
             url = file;