added default for frequently used emojis

CHANGELOG

 Please view this file on the master branch, on stable branches it's out of date.
 v 8.4.0 (unreleased)
-  - Add "Frequently used" category to emoji picker
-
-v 8.3.0 (unreleased)
   - Fix Error 500 when doing a search in dashboard before visiting any project (Stan Hu)
   - Implement new UI for group page
   - Implement search inside emoji picker
   - Add project permissions to all project API endpoints (Stan Hu)
+  - Add "Frequently used" category to emoji picker
+
 v 8.3.0
   - Add CAS support (tduehr)

app/assets/javascripts/awards_handler.coffee

@@ -127,19 +127,21 @@ class @AwardsHandler
   getFrequentlyUsedEmojis: ->
     frequently_used_emojis = ($.cookie('frequently_used_emojis') || "").split(",")
+
+    frequently_used_emojis = ["thumbsup", "thumbsdown"].concat(frequently_used_emojis)
+
     _.compact(_.uniq(frequently_used_emojis))
   renderFrequentlyUsedBlock: ->
-    if $.cookie('frequently_used_emojis')
-      frequently_used_emojis = @getFrequentlyUsedEmojis()
-      ul = $("<ul>")
-      for emoji in frequently_used_emojis
-        do (emoji) ->
-          $(".emoji-menu-content [data-emoji='#{emoji}']").closest("li").clone().appendTo(ul)
-      $("input.emoji-search").after(ul).after($("<h5>").text("Frequently used"))
+    frequently_used_emojis = @getFrequentlyUsedEmojis()
+    ul = $("<ul>")
+    for emoji in frequently_used_emojis
+      do (emoji) ->
+        $(".emoji-menu-content [data-emoji='#{emoji}']").closest("li").clone().appendTo(ul)
+    $("input.emoji-search").after(ul).after($("<h5>").text("Frequently used"))
   setupSearch: ->
     $("input.emoji-search").keyup (ev) =>