%ul.nav-links.new-session-tabs.nav-tabs.nav{ role: 'tablist' }
  %li.nav-item{ role: 'presentation' }
    %a.nav-link.qa-sign-in-tab.active{ href: '#login-pane', data: { toggle: 'tab' }, role: 'tab' } Sign in
  - if allow_signup?
    %li.nav-item{ role: 'presentation' }
      %a.nav-link.qa-register-tab{ href: '#register-pane', data: { toggle: 'tab' }, role: 'tab' } Register

%ul.nav-links.new-session-tabs.nav-tabs.nav{ role: 'tablist' }
  %li.nav-item{ role: 'presentation' }
    %a.nav-link.qa-sign-in-tab.active{ href: '#login-pane', data: { toggle: 'tab' }, role: 'tab' } Sign in
  - if allow_signup?
    %li.nav-item{ role: 'presentation' }
      %a.nav-link.qa-register-tab{ href: '#register-pane', data: { track_label: 'sign_in_register', track_property: 'sign_in', track_event: 'click_button', track_value: 'register', toggle: 'tab' }, role: 'tab' } Register

Add trackEvent when accessing the Register tab
Add trackEvent when accessing the Register tab

This is a no-op for CE.
