Resolve "2FA should not attempt to use U2F in unsupported browsers"

Closes #40005 and #27772

See merge request gitlab-org/gitlab-ce!19938

Add test for "Bug: When creating an account with invalid characters the error is "Username already taken" not "Invalid characters used""

See merge request gitlab-org/gitlab-ce!20124

Merge branch '48260-change-the-bitbucket-import-page-to-indicate-that-its-for-bb-cloud-only-not-for-on-prem-bb' into 'master'

Resolve "Change the BitBucket import page to indicate that its for BB Cloud only, not for on-prem BB"

Closes #48260

See merge request gitlab-org/gitlab-ce!20080

Resolve "Change the BitBucket import page to indicate that its for BB Cloud only, not for on-prem BB"

Resolve "Help users find our contributing page"

Closes #47274

See merge request gitlab-org/gitlab-ce!19708

Docs broken links

See merge request gitlab-org/gitlab-ce!20098

Refactor issue boards and get the EE changes to CE

See merge request gitlab-org/gitlab-ce!19839

Log push output on exception

See merge request gitlab-org/gitlab-ce!20085

Minor fixes for the Helm docs

See merge request gitlab-org/gitlab-ce!20078

Resolve "Remove top padding on GPG popovers"

Closes #48296

See merge request gitlab-org/gitlab-ce!20110

Bump sprockets to 3.7.2 to address CVE-2018-3760

See merge request gitlab-org/gitlab-ce!20109

Unify spec/support/matchers/match_ids.rb

See merge request gitlab-org/gitlab-ce!20108

Raw diffs are served from Gitaly

Closes gitaly#222

See merge request gitlab-org/gitlab-ce!20091

Unify spec/features/admin/admin_groups_spec.rb

See merge request gitlab-org/gitlab-ce!20107

Fix boards issue highlight

Closes #48068

See merge request gitlab-org/gitlab-ce!20063

CE-EE parity for lib/gitlab/git/gitlab_projects.rb

See merge request gitlab-org/gitlab-ce!20047

[Rails5] Fix "'-1' is not a valid data_store"

See merge request gitlab-org/gitlab-ce!19917

Update lfs_administration.md with language edits

See merge request gitlab-org/gitlab-ce!19950

Add troubleshooting guide for lfs uploading timeouts

See merge request gitlab-org/gitlab-ce!19949

FindRefName RPC now mandatory

Closes gitaly#221

See merge request gitlab-org/gitlab-ce!20090

Docs: add inline badges to Auto DevOps features list

See merge request gitlab-org/gitlab-ce!20096

Disallow methods that copy data on large tables

See merge request gitlab-org/gitlab-ce!20021

Fix ruby sampler metrics

See merge request gitlab-org/gitlab-ce!20039

Repository size is Gitaly only

Closes gitaly#393

See merge request gitlab-org/gitlab-ce!20089

* Use a simple counter for sampler duration instead of a histogram.
* Use a counter to collect GC time.
* Remove unused objects metric.
* Cleanup metric names to match Prometheus conventions.
* Prefix generic GC stats with `gc_stat`.
* Include worker label on memory and file descriptor metrics.

Unify spec/features/issues/filtered_search/filter_issues_spec.rb

See merge request gitlab-org/gitlab-ce!20070

Closes https://gitlab.com/gitlab-org/gitaly/issues/222