Add latest changes from gitlab-org/gitlab@master

Gemfile.lock

changelogs/unreleased/docs-job-activity-limit.yml

doc/administration/instance_limits.md

doc/administration/logs.md

doc/user/gitlab_com/index.md

doc/user/project/issues/design_management.md

...frontend/monitoring/components/charts/time_series_spec.js

spec/frontend/monitoring/components/dashboard_spec.js

...ntend/monitoring/components/dashboard_time_window_spec.js

spec/frontend/monitoring/init_utils.js

spec/frontend/monitoring/mock_data.js

spec/frontend/monitoring/store/actions_spec.js

spec/frontend/monitoring/store/getters_spec.js

spec/frontend/monitoring/store/mutations_spec.js

...avascripts/monitoring/components/dashboard_resize_spec.js

spec/lib/gitlab/email/receiver_spec.rb

spec/lib/gitlab/mail_room/mail_room_spec.rb

spec/lib/gitlab/untrusted_regexp/ruby_syntax_spec.rb

spec/lib/gitlab/untrusted_regexp_spec.rb

spec/models/ci/build_trace_chunk_spec.rb