Merge branch 'master' of https://gitlab.com/gitlab-org/gitlab-ce into expiring-lock

CHANGELOG

app/assets/javascripts/api.js.coffee

app/assets/javascripts/gl_dropdown.js.coffee

app/assets/javascripts/issue_status_select.js.coffee

app/assets/javascripts/labels_select.js.coffee

app/assets/javascripts/milestone_select.js.coffee

app/assets/javascripts/users_select.js.coffee

app/assets/stylesheets/framework/blocks.scss

app/assets/stylesheets/framework/dropdowns.scss

app/assets/stylesheets/framework/filters.scss

app/assets/stylesheets/pages/labels.scss

app/controllers/dashboard/projects_controller.rb

app/controllers/explore/projects_controller.rb

app/helpers/dropdowns_helper.rb

app/views/help/ui.html.haml

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

features/steps/dashboard/issues.rb

features/steps/dashboard/merge_requests.rb

features/steps/project/issues/filter_labels.rb

features/steps/project/issues/issues.rb