Merge branch 'feature/runner-state-filter-for-admin-view' into 'master'

...ltered_search/admin_runners_filtered_search_token_keys.js

...ripts/filtered_search/filtered_search_dropdown_manager.js

...ts/javascripts/filtered_search/filtered_search_manager.js

...javascripts/filtered_search/filtered_search_token_keys.js

...ts/filtered_search/issuable_filtered_search_token_keys.js

app/assets/javascripts/filtered_search/null_dropdown.js

app/assets/javascripts/pages/admin/runners/index.js

app/assets/javascripts/pages/constants.js

app/assets/javascripts/pages/groups/issues/index.js

app/assets/javascripts/pages/groups/merge_requests/index.js

app/assets/javascripts/pages/projects/issues/index/index.js

.../javascripts/pages/projects/merge_requests/index/index.js

app/controllers/admin/runners_controller.rb

app/finders/admin/runners_finder.rb

app/helpers/sorting_helper.rb

app/models/ci/runner.rb

app/views/admin/runners/_runner.html.haml

app/views/admin/runners/_runner_table_cell.html.haml

app/views/admin/runners/_sort_dropdown.html.haml

app/views/admin/runners/index.html.haml