Fixed up settings view.

Fix review issues.

_locales/en/messages.json

@@ -1102,17 +1102,22 @@
     "message": "General",
     "description": "Header for general options on the settings screen"
   },
-  "sendLinkPreviews": {
-    "message": "Send Link Previews",
+  "linkPreviews": {
+    "message": "Link Previews",
     "description":
       "Option to control creation and send of link previews in setting screen"
   },
   "linkPreviewsDescription": {
     "message":
-      "Enable local link previews (Restart for changes to take effect)",
+      "Previews are supported for Imgur, Instagram, Reddit, and YouTube links.",
     "description":
       "Additional detail provided for Link Previews option in settings screen"
   },
+  "linkPreviewsSettingDescription": {
+    "message":
+      "Enable local link previews (Restart for changes to take effect).",
+    "description": "Description shown for the Link Preview option "
+  },
   "spellCheckDescription": {
     "message": "Enable spell check of text entered in message composition box",
     "description": "Description of the media permission description"

js/views/settings_view.js

@@ -218,8 +218,9 @@
         spellCheckHeader: i18n('spellCheck'),
         spellCheckDescription: i18n('spellCheckDescription'),
         blockedHeader: 'Blocked Users',
-        sendLinkPreviews: i18n('sendLinkPreviews'),
+        linkPreviews: i18n('linkPreviews'),
         linkPreviewsDescription: i18n('linkPreviewsDescription'),
+        linkPreviewsSettingDescription: i18n('linkPreviewsSettingDescription'),
       };
     },
     onClose() {

libtextsecure/sendmessage.js

@@ -308,10 +308,11 @@ MessageSender.prototype = {
     const silent = false;
 
     // Remove this when we add support for attachments
-    message.attachmentPointers = null;
-    message.preview = null;
+    message.attachments = [];
+    message.attachmentPointers = [];
+    message.preview = [];
     if (message.quote) {
-      message.quote.attachments = null;
+      message.quote.attachments = [];
     }
 
     return Promise.all([

settings.html

@@ -98,11 +98,16 @@
         <input type='checkbox' name='spell-check-setting' id='spell-check-setting' />
         <label for='spell-check-setting'>{{ spellCheckDescription }}</label>
       </div>
-      <div class='link-preview-setting'>
-        <input type='checkbox' name='link-preview-setting' id='link-preview-setting' />
-        <label for='link-preview-setting'>{{ linkPreviewsDescription }}</label>
-      </div>
+
     <hr>
+    <h3>{{ linkPreviews }}</h3>
+    <div>{{ linkPreviewsDescription }}<div>
+    </br>
+    <div class='link-preview-setting'>
+      <input type='checkbox' name='link-preview-setting' id='link-preview-setting' />
+      <label for='link-preview-setting'>{{ linkPreviewsSettingDescription }}</label>
+    </div>
+  <hr>
     <div class='permissions-setting'>
       <h3>{{ permissions }}</h3>
       <div class='media-permissions'>