The GitLab operations refer to the namespace as "group", it should be changed with help text added to clarify as per: https://docs.gitlab.com/ee/user/group/#namespaces
Changes:
- "Group" should be "Namespace"
- Default text - "e.g. username (default) or group/sub_group"
- Help text - "BuildMaster will use the user account as the default namespace when searching for a project name"