update editor language selection UI for i18n

packages/node_modules/@node-red/editor-client/locales/en-US/editor.json

@@ -929,5 +929,12 @@
         "description": "Description",
         "appearance": "Appearance",
         "env": "Environment Variables"
+    },
+    "languages" : {
+        "de": "German",
+        "en-US": "English",
+        "ja": "Japanese",
+        "ko": "Korean",
+        "zh-CN": "Chinese(Simplified)"
     }
 }

packages/node_modules/@node-red/editor-client/locales/ja/editor.json

@@ -42,7 +42,9 @@
                 "defaultDir": "標準",
                 "ltr": "左から右",
                 "rtl": "右から左",
-                "auto": "文脈"
+                "auto": "文脈",
+                "language": "表示言語",
+                "browserDefault": "ブラウザのデフォルト"
             },
             "sidebar": {
                 "show": "サイドバーを表示"
@@ -914,5 +916,12 @@
         "description": "説明",
         "appearance": "外観",
         "env": "環境変数"
+    },
+    "languages" : {
+        "de": "ドイツ語",
+        "en-US": "英語",
+        "ja": "日本語",
+        "ko": "韓国語",
+        "zh-CN": "中国語(簡体)"
     }
 }