WebUI: fix 'rename files' dialog cannot be opened more than once

Added an IIFE around the whole script to suppress variable redeclaration errors.

Closes #21614.
Original PR #21620.
PR #21621.

src/webui/www/private/rename_files.html

@@ -14,15 +14,13 @@
     <script>
         "use strict";
 
+        (() => {
             if (window.parent.qBittorrent !== undefined)
                 window.qBittorrent = window.parent.qBittorrent;
             window.qBittorrent = window.parent.qBittorrent;
 
-        const TriState = window.qBittorrent.FileTree.TriState;
             const data = window.MUI.Windows.instances["multiRenamePage"].options.data;
-        let bulkRenameFilesContextMenu;
+            const bulkRenameFilesContextMenu = new window.qBittorrent.ContextMenu.ContextMenu({
-        if (!bulkRenameFilesContextMenu) {
-            bulkRenameFilesContextMenu = new window.qBittorrent.ContextMenu.ContextMenu({
                 targets: "#bulkRenameFilesTableDiv tr",
                 menu: "multiRenameFilesMenu",
                 actions: {
@@ -40,7 +38,6 @@
                     y: 2
                 }
             });
-        }
 
             // Setup the dynamic table for bulk renaming
             const bulkRenameFilesTable = new window.qBittorrent.DynamicTable.BulkRenameTorrentFilesTable();
@@ -48,11 +45,8 @@
 
             // Inject checkbox into the first column of the table header
             const tableHeaders = $$("#bulkRenameFilesTableFixedHeaderDiv .dynamicTableHeader th");
-        let checkboxHeader;
             if (tableHeaders.length > 0) {
-            if (checkboxHeader)
+                const checkboxHeader = new Element("input");
-                checkboxHeader.remove();
-            checkboxHeader = new Element("input");
                 checkboxHeader.set("type", "checkbox");
                 checkboxHeader.set("id", "rootMultiRename_cb");
                 checkboxHeader.addEvent("click", (e) => {
@@ -67,9 +61,7 @@
 
             // Register keyboard events to modal window
             // https://github.com/qbittorrent/qBittorrent/pull/18687#discussion_r1135045726
-        let keyboard;
+            const keyboard = new Keyboard({
-        if (!keyboard) {
-            keyboard = new Keyboard({
                 defaultEventType: "keydown",
                 events: {
                     "Escape": function(event) {
@@ -83,7 +75,6 @@
                 }
             });
             keyboard.activate();
-        }
 
             const fileRenamer = new window.qBittorrent.MultiRename.RenameFiles();
             fileRenamer.hash = data.hash;
@@ -403,6 +394,7 @@
                 }).send();
             };
             setupTable(data.selectedRows);
+        })();
     </script>
 </head>