Add separator at the end of categories

app/assets/javascripts/search_autocomplete.js.coffee

@@ -85,10 +85,15 @@ class @SearchAutocomplete
         data = []
 
         # List results
+        firstCategory = true
         for suggestion in response
 
           # Add group header before list each group
           if lastCategory isnt suggestion.category
+            data.push 'divider' if !firstCategory
+
+            firstCategory = false if firstCategory
+
             data.push
               header: suggestion.category