Merge branch 'issue-filter-click-to-search' into 'master'

app/assets/javascripts/filtered_search/dropdown_hint.js.es6

...vascripts/filtered_search/filtered_search_dropdown.js.es6

...s/filtered_search/filtered_search_dropdown_manager.js.es6

...avascripts/filtered_search/filtered_search_manager.js.es6

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

changelogs/unreleased/issue-filter-click-to-search.yml

...features/issues/filtered_search/dropdown_assignee_spec.rb

spec/features/issues/filtered_search/dropdown_author_spec.rb

spec/features/issues/filtered_search/dropdown_label_spec.rb

...eatures/issues/filtered_search/dropdown_milestone_spec.rb

spec/features/issues/filtered_search/filter_issues_spec.rb

...tered_search/filtered_search_dropdown_manager_spec.js.es6