Issue title realtime

app/assets/javascripts/issue_show/index.js

app/assets/javascripts/issue_show/issue_title.js

app/assets/javascripts/issue_show/services/index.js

...javascripts/vue_pipelines_index/stores/pipelines_store.js

app/assets/javascripts/vue_realtime_listener/index.js

app/controllers/projects/issues_controller.rb

app/models/issue.rb

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

config/routes/project.rb

config/webpack.config.js

lib/gitlab/etag_caching/middleware.rb

spec/features/gitlab_flavored_markdown_spec.rb

spec/features/issues/award_emoji_spec.rb

spec/features/issues/move_spec.rb

spec/features/issues/spam_issues_spec.rb

spec/features/issues_spec.rb

spec/javascripts/issue_show/issue_title_spec.js

spec/javascripts/test_bundle.js