Add 'Undo mark all as done' to Todos

Added the ability to 'Undo mark all as done' todos marked as complete with 'Mark all as done'
in the 'Todo' tab of the Todo dashboard.
The operation undos only the todo previously marked as done with the 'Mark al as done' button.

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/api/v3/todos.rb b/lib/api/v3/todos.rb
index e60cb25e57b..e3b311d61cd 100644
--- a/lib/api/v3/todos.rb
+++ b/lib/api/v3/todos.rb
@@ -20,9 +20,9 @@ module API
         desc 'Mark all todos as done'
         delete do
           status(200)
-          
+
           todos = TodosFinder.new(current_user, params).execute
-          TodoService.new.mark_todos_as_done(todos, current_user)
+          TodoService.new.mark_todos_as_done(todos, current_user).size
         end
       end
     end