Fix issue being ordered twice and callback when moving between states

CHANGELOG

@@ -92,6 +92,7 @@ v 8.9.0
   - Links from a wiki page to other wiki pages should be rewritten as expected
   - Add option to project to only allow merge requests to be merged if the build succeeds (Rui Santos)
   - Added navigation shortcuts to the project pipelines, milestones, builds and forks page. !4393
+  - Fix changing issue state columns in milestone view
   - Fix issues filter when ordering by milestone
   - Disable SAML account unlink feature
   - Added artifacts:when to .gitlab-ci.yml - this requires GitLab Runner 1.3

app/assets/javascripts/milestone.js.coffee

@@ -81,6 +81,7 @@ class @Milestone
       stop: (event, ui) ->
         $(".issues-sortable-list").css "min-height", "0px"
       update: (event, ui) ->
+        if this == ui.item.parent()[0]
           data = $(this).sortable("serialize")
           Milestone.sortIssues(data)
 

app/controllers/projects/issues_controller.rb

@@ -116,7 +116,7 @@ class Projects::IssuesController < Projects::ApplicationController
         end
       end
       format.json do
-        render json: @issue.to_json(include: { milestone: {}, assignee: { methods: :avatar_url }, labels: { methods: :text_color } })
+        render json: @issue.to_json(include: { milestone: {}, assignee: { methods: :avatar_url }, labels: { methods: :text_color } }, methods: :saved)
       end
     end
   end

app/models/issue.rb

@@ -190,4 +190,8 @@ class Issue < ActiveRecord::Base
   def overdue?
     due_date.try(:past?) || false
   end
+
+  def saved
+    valid?
+  end
 end