Fix broken account layout

[stevepolitodesign]

We just need to wrap the markup in a loop.

      <% @active_sessions.each do |active_session| %>
        <tr>
          <td><%= active_session.user_agent %></td>
          <td><%= active_session.ip_address %></td>
          <td><%= active_session.created_at %></td>
          <td><%= button_to "Sign Out", active_session_path(active_session), method: :delete %></td>
        </tr>
      <% end %>