Updates from last code review.

CHANGELOG

app/assets/javascripts/dispatcher.js.coffee

app/assets/javascripts/milestone.js.coffee

app/assets/stylesheets/pages/milestone.scss

app/controllers/projects/milestones_controller.rb

app/decorators/label_with_milestone.rb

app/finders/issuable_finder.rb

app/helpers/milestones_helper.rb

app/models/concerns/issuable.rb

app/models/concerns/milestoneish.rb

app/models/global_label.rb

app/models/global_milestone.rb

app/models/merge_request.rb

app/models/milestone.rb

app/models/project.rb

app/views/dashboard/milestones/_milestone.html.haml

app/views/dashboard/milestones/show.html.haml

app/views/groups/milestones/_milestone.html.haml

app/views/groups/milestones/show.html.haml

app/views/projects/milestones/_milestone.html.haml