Move 'clone build' and 'restart build' to top menu

Dependencies

• [2] E3X3C5LK Replace ugly link with nice small buttons
• [*] QL55ECJ6 - adapted ui for hydra, more in line with nixos.org website

Change contents

• edit in src/root/topbar.tt at line 113
  [2.1831]

  [2.1831]
  + <li class="divider"></li>

  + [% INCLUDE makeLink

  + uri = c.uri_for('/build' build.id 'clone')

  + title = "Clone build" %]

  + [% INCLUDE makeLink

  + uri = '#'

  + title = "Restart build" %]