Bug 29299: Reindent serials search template

Bug 29299: Reindent serials search template

This patch updates the serials search template to give it consistent
indentation.

The patch also moves one section of markup: The <tfoot> section is moved
to after <tbody> in order to conform to current standards.

To test, apply the patch and go to Serials -> Search subscriptions (in
the header).

- Serials search should work correctly and the page should look correct.
- With Mana enabled, click on the "Search on Mana" link in the sidebar.
- Searches of Mana should work correctly too.
- If you view the diff while ignoring whitespace the only changes should
  be the move of <tfoot> and places  where line breaks were introduced.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>