fixing bulletin default widget

lib/orbit_app/module/widget.rb

@@ -102,7 +102,7 @@ module OrbitApp
           def  initialize(&block)
             @query = nil
             @image = nil
-	    @sorting_query = nil
+	      @sorting_query = 'desc(:created_at)'
             @more_link = {}
             @fields = []
             @enabled_styles = STYLE

vendor/built_in_modules/announcement/init.rb

@@ -29,7 +29,7 @@ module Announcement
 
     widgets do
       default_widget do
-	sorting 'desc(:created_at)'
+	  sorting 'desc(:postdate)'
         query 'Bulletin.any_of( {deadline: nil,:postdate.lte => Time.now} , {:deadline.gte => Time.now,:postdate.lte => Time.now} )'
         enable ["typeA","typeB_style3","typeC"]
         image :image