Make "Versions" string on the navbar translatable.

i18n/en.toml

@@ -210,6 +210,9 @@ other = "Your Kubernetes server must be at or later than version "
 [version_check_tocheck]
 other = "To check the version, enter "
 
+[version_menu]
+other = "Versions"
+
 [warning]
 other = "Warning:"
 

i18n/ja.toml

@@ -58,6 +58,9 @@ other = "このページは役に立ちましたか？"
 [feedback_yes]
 other = "はい"
 
+[input_placeholder_email_address]
+other = "メールアドレス"
+
 [latest_version]
 other = "最新バージョン"
 
@@ -187,11 +190,11 @@ other = "作業するKubernetesサーバーは次のバージョン以降のも
 [version_check_tocheck]
 other = "バージョンを確認するには次のコマンドを実行してください: "
 
-[whatsnext_heading]
-other = "次の項目"
+[version_menu]
+other = "バージョン"
 
 [warning]
 other = "警告:"
 
-[input_placeholder_email_address]
-other = "メールアドレス"
+[whatsnext_heading]
+other = "次の項目"

layouts/partials/navbar-version-selector.html

@@ -0,0 +1,8 @@
+<a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+  {{ T "version_menu" }}
+</a>
+<div class="dropdown-menu" aria-labelledby="navbarDropdownMenuLink">
+	{{ range .Site.Params.versions }}
+	<a class="dropdown-item" href="{{ .url }}">{{ .version }}</a>
+	{{ end }}
+</div>