Bootstrap 3 cleanup from the IDE page - #2 (#24175)

* Remove skipLoadingStyleSheet

* Remove unused bootstrap-5 assignment from the Account settings page since it's archived

* Remove bsVersionIcon

* Remove bsVersion, bootstrapVersion and isBootstrap5 from elements on the IDE page

* Remove BS3Dropdown from the context menu

* Cleanup Bootstrap 3 related comment and type

GitOrigin-RevId: a67244eb78943ee84cc5f89bae164c0361e8fc13

services/web/frontend/js/features/file-tree/components/file-tree-context-menu.tsx

@@ -1,6 +1,5 @@
 import React, { useEffect, useRef } from 'react'
 import ReactDOM from 'react-dom'
-import { Dropdown as BS3Dropdown } from 'react-bootstrap'
 import {
   Dropdown,
   DropdownMenu,
@@ -48,7 +47,7 @@ function FileTreeContextMenu() {
 
   // A11y - Close the context menu when the user presses the Tab key
   // Focus should move to the next element in the filetree
-  function handleKeyDown(event: React.KeyboardEvent<BS3Dropdown | Element>) {
+  function handleKeyDown(event: React.KeyboardEvent<Element>) {
     if (event.key === 'Tab') {
       close()
     }