Restore link to clearvcscache

Dependencies

• [2] 7ZQAHJQM Fix indentation
• [*] QL55ECJ6 - adapted ui for hydra, more in line with nixos.org website
• [*] OEPUOUNB Using twitter bootstrap for more consistent looks for Hydra

Change contents

• edit in src/root/topbar.tt at line 97
  [2.2592]

  [5.15847]
  + [% INCLUDE menuItem

  + uri = c.uri_for(c.controller('Admin').action_for('clearvcscache'))

  + title = "Clear VCS caches"

  + confirmmsg = "Are you sure you want to clear the VCS cache?"

  + class = "" %]