Added content_type to ticket_articles.

app/assets/javascripts/app/controllers/ticket_zoom.js.coffee

@@ -579,6 +579,7 @@ class App.TicketZoom extends App.Controller
       articleParams.from      = @Session.get().displayName()
       articleParams.ticket_id = ticket.id
       articleParams.form_id   = @form_id
+      articleParams.content_type = 'text/html'
 
       if !articleParams['internal']
         articleParams['internal'] = false
@@ -1508,6 +1509,10 @@ class Article extends App.Controller
 
   preview: ->
 
+    if @article.content_type is 'text/html'
+      @article['html'] = @article.body
+      return
+
     # build html body
     # cleanup body
 #    @article['html'] = @article.body.trim()

app/assets/javascripts/app/models/ticket_article.js.coffee

@@ -1,5 +1,5 @@
 class App.TicketArticle extends App.Model
-  @configure 'TicketArticle', 'from', 'to', 'cc', 'subject', 'body', 'ticket_id', 'type_id', 'sender_id', 'internal', 'in_reply_to', 'form_id', 'updated_at'
+  @configure 'TicketArticle', 'from', 'to', 'cc', 'subject', 'body', 'content_type', 'ticket_id', 'type_id', 'sender_id', 'internal', 'in_reply_to', 'form_id', 'updated_at'
   @extend Spine.Model.Ajax
   @url: @apiPath + '/ticket_articles'
   @configure_attributes = [

db/migrate/20141227000001_update_ticket_article.rb

@@ -0,0 +1,8 @@
+class UpdateTicketArticle < ActiveRecord::Migration
+  def up
+    add_column :ticket_articles, :content_type,  :string, :limit => 20,  :null => false, :default => 'text/plain'
+  end
+
+  def down
+  end
+end