Added text color to issues labels in issue board lists

app/assets/javascripts/boards/models/label.js.es6

@@ -3,6 +3,7 @@ class ListLabel {
     this.id = obj.id;
     this.title = obj.title;
     this.color = obj.color;
+    this.textColor = obj.text_color;
     this.description = obj.description;
     this.priority = (obj.priority !== null) ? obj.priority : Infinity;
   }

app/controllers/projects/boards/issues_controller.rb

@@ -12,7 +12,7 @@ module Projects
           only: [:iid, :title, :confidential],
           include: {
             assignee: { only: [:id, :name, :username], methods: [:avatar_url] },
-            labels:   { only: [:id, :title, :description, :color, :priority] }
+            labels:   { only: [:id, :title, :description, :color, :priority], methods: [:text_color] }
           })
       end