Update code according comment recommendations

app/controllers/dashboard/application_controller.rb

@@ -12,8 +12,4 @@ class Dashboard::ApplicationController < ApplicationController
   def projects
     @projects ||= current_user.authorized_projects.sorted_by_activity.non_archived
   end
-
-  def groups
-    @groups ||= GroupsFinder.new(current_user, state_all: true).execute
-  end
 end

app/controllers/dashboard/milestones_controller.rb

@@ -4,13 +4,13 @@ class Dashboard::MilestonesController < Dashboard::ApplicationController
   include MilestoneActions
 
   before_action :projects
-  before_action :groups
+  before_action :groups, only: :index
   before_action :milestone, only: [:show, :merge_requests, :participants, :labels]
 
   def index
     respond_to do |format|
       format.html do
-        @milestone_states = GlobalMilestone.states_count(@projects, @groups)
+        @milestone_states = Milestone.states_count(@projects, @groups)
         @milestones = Kaminari.paginate_array(milestones).page(params[:page])
       end
       format.json do
@@ -43,4 +43,8 @@ class Dashboard::MilestonesController < Dashboard::ApplicationController
     @milestone = DashboardMilestone.build(@projects, params[:title])
     render_404 unless @milestone
   end
+
+  def groups
+    @groups ||= GroupsFinder.new(current_user, state_all: true).execute
+  end
 end

app/controllers/groups/milestones_controller.rb

@@ -10,7 +10,7 @@ class Groups::MilestonesController < Groups::ApplicationController
   def index
     respond_to do |format|
       format.html do
-        @milestone_states = GlobalMilestone.states_count(group_projects, group)
+        @milestone_states = Milestone.states_count(group_projects, [group])
         @milestones = Kaminari.paginate_array(milestones).page(params[:page])
       end
       format.json do