If a user locks a file without realizing only they or a master can unlock the file, this can disrupt the rest of the team significantly. In addition to disabling File Locking at the instance level https://gitlab.com/gitlab-org/gitlab-ee/issues/4391 we should also allow GitLab.com customers and individual teams to disable file locking. ### Proposal - Add setting to disable file locking to Group settings - Add setting to disable file locking to Project settings ### Links / references https://gitlab.com/gitlab-org/gitlab-ee/issues/4391