Fixes some requests not being tracked in performance bar

Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/57886

app/assets/javascripts/main.js

@@ -78,7 +78,6 @@ function deferredInitialisation() {
   initUserPopovers();
 
   if (document.querySelector('.search')) initSearchAutocomplete();
-  if (document.querySelector('#js-peek')) initPerformanceBar({ container: '#js-peek' });
 
   addSelectOnFocusBehaviour('.js-select-on-focus');
 
@@ -145,6 +144,8 @@ document.addEventListener('DOMContentLoaded', () => {
   const $sidebarGutterToggle = $('.js-sidebar-toggle');
   let bootstrapBreakpoint = bp.getBreakpointSize();
 
+  if (document.querySelector('#js-peek')) initPerformanceBar({ container: '#js-peek' });
+
   initLayoutNav();
 
   // Set the default path for all cookies to GitLab's root directory