Support i18n in MQTT node property

packages/node_modules/@node-red/nodes/core/network/10-mqtt.html

@@ -421,7 +421,11 @@
 <script type="text/javascript">
 (function() {
 
-    var typedInputNoneOpt = { value: 'none', label: '', hasValue: false };
+    var typedInputNoneOpt = {
+        value: 'none',
+        label: RED._("node-red:mqtt.label.none"),
+        hasValue: false
+    };
     var makeTypedInputOpt = function(value){
         return {
             value: value,
@@ -436,7 +440,7 @@
         makeTypedInputOpt("text/csv"),
         makeTypedInputOpt("text/html"),
         makeTypedInputOpt("text/plain"),
-        {value:"other", label:""}
+        { value: "other", label: RED._("node-red:mqtt.label.other") }
     ];
 
     function getDefaultContentType(value) {

packages/node_modules/@node-red/nodes/locales/en-US/messages.json

@@ -446,7 +446,9 @@
             "staticTopic": "Subscribe to single topic",
             "dynamicTopic": "Dynamic subscription",
             "auto-connect": "Connect automatically",
-            "auto-mode-depreciated": "This option is depreciated. Please use the new auto-detect mode."
+            "auto-mode-depreciated": "This option is depreciated. Please use the new auto-detect mode.",
+            "none": "none",
+            "other": "other"
         },
         "sections-label": {
             "birth-message": "Message sent on connection (birth message)",

packages/node_modules/@node-red/nodes/locales/ja/messages.json

@@ -446,7 +446,9 @@
             "staticTopic": "1つのトピックを購読",
             "dynamicTopic": "動的な購読",
             "auto-connect": "自動接続",
-            "auto-mode-depreciated": "本オプションは非推奨になりました。新しい自動判定モードを使用してください。"
+            "auto-mode-depreciated": "本オプションは非推奨になりました。新しい自動判定モードを使用してください。",
+            "none": "なし",
+            "other": "その他"
         },
         "sections-label": {
             "birth-message": "接続時の送信メッセージ(Birthメッセージ)",