Update the gitignore and gitlab-ci templates for 9.0

See merge request !9824

Remove timeout from awards_handler_spec.js

See merge request !9822

specify where to finish database HA setup

See merge request !9731

Fixed typo with project service documentation link

See merge request !9708

Fix name colision when importing GitHub pull requests from forked repositories

Closes #29034

See merge request !9719

Refactor dropdown_milestone_spec.rb

Closes #29162

See merge request !9814

Convert Issue into ES6 class

See merge request !9636

Remove hidden text from subscribe button

Closes #29165

See merge request !9790

Decrease Capybara timeout for CI environment

Closes #29091

See merge request !9816

spell out what VIP is

See merge request !9733

Remove extra space for settings dropdown

See merge request !9788

Raise an exception if creating a test repository fails

See merge request !9815

Fix reference to node_modules for emoji unicode versions

Closes #29192

See merge request !9810

Update container_registry.md: fix private-docker link

See merge request !9686

Changed dropdown style slightly

Closes #26202

See merge request !9747

Prevent visual token dropdown from opening the wrong filter dropdown

See merge request !9789

Style action buttons in show environments view to match index view

Closes #29185

See merge request !9804

Fixes https://gitlab.com/gitlab-org/gitlab-ce/issues/29192

See https://gitlab.slack.com/archives/frontend/p1488973548024005

Added discussion comments avatars to diff

Closes #17237

See merge request !7357

Update GITLAB_SHELL_VERSION to 5.0.0

See merge request !9809

Don't show double nav bar on project page when activity is the default project view

Closes #29096

See merge request !9798

Related to gitlab-ee#1648

Speed up MergeRequest::RefreshService spec by combining examples

See merge request !9801

Fix 'Object not found - no match for id (sha)' when importing GitHub PRs

Closes #29093

See merge request !9751

Don't show links to tag a commit for non permitted users

Closes #26188

See merge request !8407

Apply same html and css to the action buttons in environment show view table as the ones in index table