Scrum view style milestone view.

Created by: dosire

Scrum view for issues. As discussed in http://feedback.gitlab.com/forums/176466-general/suggestions/3812741-scrum-planning-view-for-issues

app/assets/javascripts/milestones.js.coffee

 $ ->
-  $('.milestone-issue-filter li[data-closed]').addClass('hide')
-
-  $('.milestone-issue-filter ul.nav li a').click ->
-    $('.milestone-issue-filter li').toggleClass('active')
-    $('.milestone-issue-filter li[data-closed]').toggleClass('hide')
-    false
-
   $('.milestone-merge-requests-filter li[data-closed]').addClass('hide')
   $('.milestone-merge-requests-filter ul.nav li a').click ->