Running a pipeline for a project without branches - dropdown does not have default height

Running a pipeline for a project without branches - dropdown does not have a default height

Solution

The dropdown field should be 32px height even when no option is provided.

Design specs for forms:

• https://design.gitlab.com/components/forms/#design-specification
• https://gitlab-org.gitlab.io/gitlab-design/hosted/design-gitlab-specs/forms-spec-previews/