Follow-up from "Restore project-specific shortcuts within the super sidebar"

The following discussion from !117725 (merged) should be addressed:

• @ayufan started a discussion:

  Suggestion: We can avoid array creation with:

        shortcut_links << {
          title: _('Create a new issue'),
          href: new_project_issue_path(project),
          css_class: 'shortcuts-new-issue'
        }