Sometimes you cannot find the group in the autofill dropdown for elasticsearch indexed groups

If there are many matches with the substring you are searching for in the group auto complete dropdown then you cannot find the specific group and there is no way to enable Elasticsearch for that group.

In general I think this bug happens across many auto complete dropdowns in GitLab. We should probably put exact matches at the top of the list to ensure it's always possible to find anything.

This caused problems in https://gitlab.com/gitlab-com/gl-infra/production/issues/1591