Let email node be able to send blank topic

and let msg.description be " also
to close #959

social/email/61-email.js

@@ -98,7 +98,8 @@ module.exports = function(RED) {
                         sendopts.headers = msg.headers;
                         sendopts.priority = msg.priority;
                     }
-                    sendopts.subject = msg.topic || msg.title || "Message from Node-RED"; // subject line
+                    if (msg.hasOwnProperty("topic") && msg.topic === '') { sendopts.subject = ""; }
+                    else { sendopts.subject = msg.topic || msg.title || "Message from Node-RED"; } // subject line
                     if (msg.hasOwnProperty("header") && msg.header.hasOwnProperty("message-id")) {
                         sendopts.inReplyTo = msg.header["message-id"];
                         sendopts.subject = "Re: " + sendopts.subject;
@@ -119,7 +120,8 @@ module.exports = function(RED) {
                             sendopts.attachments[0].contentType = msg.headers["content-type"];
                         }
                         // Create some body text..
-                        sendopts.text = RED._("email.default-message",{filename:fname, description:(msg.description||"")});
+                        if (msg.hasOwnProperty("description")) { sendopts.text = msg.description; }
+                        else { sendopts.text = RED._("email.default-message",{filename:fname}); }
                     }
                     else {
                         var payload = RED.util.ensureString(msg.payload);

social/email/locales/de/61-email.json

@@ -36,7 +36,7 @@
             "always": "immer",
             "rejectUnauthorised": "Überprüfen sie, ob das serverzertifikat gültig ist"
         },
-        "default-message": "__description__\n\nDatei von Node-RED ist angehängt: __filename__",
+        "default-message": "\nDatei von Node-RED ist angehängt: __filename__",
         "tip": {
             "cred": "<b>Hinweis</b>: Berechtigungen von globaler emailkeys.js-Datei kopiert",
             "recent": "Tipp: Es wird nur die letzte E-Mail abgerufen",

social/email/locales/en-US/61-email.json

@@ -42,10 +42,10 @@
             "keyFile":"Private key",
             "users": "Users",
             "auth": "Authenticate users",
-            "addButton": "Add",   
+            "addButton": "Add",
             "expert": "Expert"
         },
-        "default-message": "__description__\n\nFile from Node-RED is attached: __filename__",
+        "default-message": "\nFile from Node-RED is attached: __filename__",
         "tip": {
             "cred": "<b>Note:</b> Copied credentials from global emailkeys.js file.",
             "recent": "Tip: Only retrieves the single most recent email.",

social/email/locales/ja/61-email.json

@@ -36,7 +36,7 @@
             "always": "常時",
             "rejectUnauthorised": "チェックサーバ証明書は有効です"
         },
-        "default-message": "__description__\n\nNode-REDからファイルが添付されました: __filename__",
+        "default-message": "\nNode-REDからファイルが添付されました: __filename__",
         "tip": {
             "cred": "<b>注釈:</b> emailkeys.jsファイルから認証情報をコピーしました。",
             "recent": "注釈: 最新のメールを1件のみ取得します。",

social/email/package.json

@@ -1,6 +1,6 @@
 {
   "name": "node-red-node-email",
-  "version": "1.18.1",
+  "version": "1.18.2",
   "description": "Node-RED nodes to send and receive simple emails.",
   "dependencies": {
     "imap": "^0.8.19",