Switch Branches and MR tab order in IDE nav

**Why?**
Currently the order of tabs is backward from the
order of info in the dropdown itself.

app/assets/javascripts/ide/components/nav_form.vue

@@ -19,15 +19,15 @@ export default {
     <tabs stop-propagation>
       <tab active>
         <template slot="title">
-          {{ __('Merge Requests') }}
+          {{ __('Branches') }}
         </template>
-        <merge-request-search-list />
+        <branches-search-list />
       </tab>
       <tab>
         <template slot="title">
-          {{ __('Branches') }}
+          {{ __('Merge Requests') }}
         </template>
-        <branches-search-list />
+        <merge-request-search-list />
       </tab>
     </tabs>
   </div>

changelogs/unreleased/fe-ide-nav-switch-branches-and-mr-tab-order.yml

+---
+title: Switch order of tabs in Web IDE nav dropdown
+merge_request: 24199
+author:
+type: changed