Use default context sort order when returning autocomplete

Fixes #1403

app/controllers/contexts_controller.rb

@@ -234,15 +234,7 @@ class ContextsController < ApplicationController
   
   def render_autocomplete
     lambda do
-      # find contexts and the todos count. use a join to prevent all count(todos) of each context to be fetched
-      context_and_todo_count = current_user.contexts.
-        select('contexts.*, count(todos.id) as todos_count').
-        joins('left outer join todos on context_id=contexts.id').
-        group('context_id')
-
-      filled_contexts = context_and_todo_count.reject { |ctx| ctx.todos.size == 0 } 
-      empty_contexts = context_and_todo_count.find_all { |ctx| ctx.todos.size == 0 } 
-      render :text => for_autocomplete(filled_contexts + empty_contexts, params[:term])
+      render :text => for_autocomplete(current_user.contexts, params[:term])
     end
   end