Merge branch 'multi-filter-labels' into 'master'

app/assets/javascripts/dispatcher.js.coffee

app/assets/javascripts/gl_dropdown.js.coffee

app/assets/javascripts/issuable.js.coffee

app/assets/javascripts/issues.js.coffee

app/assets/javascripts/labels_select.js.coffee

app/assets/javascripts/lib/animate.js.coffee

app/assets/javascripts/lib/url_utility.js.coffee

app/assets/javascripts/merge_requests.js.coffee

app/assets/javascripts/milestone_select.js.coffee

app/assets/javascripts/users_select.js.coffee

app/controllers/projects/issues_controller.rb

app/controllers/projects/merge_requests_controller.rb

app/finders/issuable_finder.rb

app/helpers/application_helper.rb

app/helpers/issuables_helper.rb

app/models/label.rb

app/views/shared/_label_row.html.haml

app/views/shared/_labels_row.html.haml

app/views/shared/issuable/_filter.html.haml

app/views/shared/issuable/_label_dropdown.html.haml