Merge branch 'revert-mr-state-names'

CHANGELOG

app/finders/issuable_finder.rb

app/helpers/application_helper.rb

app/models/merge_request.rb

app/models/milestone.rb

app/views/projects/merge_requests/_merge_request.html.haml

app/views/projects/merge_requests/show/_mr_title.html.haml

app/views/projects/merge_requests/widget/_closed.html.haml

app/views/projects/merge_requests/widget/_merged.html.haml

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

app/views/search/results/_merge_request.html.haml

app/views/shared/_issuable_filter.html.haml

features/project/merge_requests.feature

features/steps/project/merge_requests.rb

spec/requests/api/merge_requests_spec.rb