Combine latest and 5.0 entries in the switcher (#2856)

* Combine latest and 5.0 entries in the switcher

* Refactor

* Fix

* Fix

Author: mnocon

docs/js/custom.js

@@ -2,6 +2,8 @@
 let jquery = jQuery;
 
 $(document).ready(function() {
+    const latestVersionNumber = '5.0';
+
     // replace edit url
     let branchName = 'master';
     const branchNameRegexp = /\/en\/([a-z0-9-_.]*)\//g.exec(document.location.href);
@@ -76,6 +78,14 @@ $(document).ready(function() {
             const allVersions = [...document.querySelectorAll('.switcher__list .versions dd')];
             const olderVersions = document.querySelector('#older-versions');
 
+            // Merge "X.Y" and "latest" entries into "X.Y (latest)"
+            const latestVersion = allVersions.find(v => v.textContent.trim() === 'latest');
+            const versionXY = allVersions.find(v => v.textContent.trim() === latestVersionNumber);
+            
+            const versionXYLink = versionXY.querySelector('a');
+            versionXYLink.textContent = `${latestVersionNumber} (latest)`;
+            latestVersion.remove();
+
             if (eolVersions.length > 0) {
                 olderVersions.hidden = false;
             }