Proper styling for flash message

Dependencies

• [2] WRIU3S5E * UI for cloning builds (not functional yet).
• [3] TVGN5QT5 add link to status page on queue page
• [4] ZLQL62FK Only show "Running build steps" if there are running build steps
• [5] TP3PFR5K

Change contents

• replacement in src/root/queue.tt at line 9
  [2.2409]→[2.2409:2445](∅→∅)
  − <p class="error">[% flashMsg %]</p>
  [2.2409]

  [2.2445]
  + <p class="btn-info btn-large">[% flashMsg %]</p>