Bug 27998: Replace obsolete title-string sorting: Serials templates

Bug 27998: Replace obsolete title-string sorting: Serials templates

This patch modifies several serials  templates to replace the use of
the "title-string" DataTables sorting method with the newer "data-order"
attribute.

To test, apply the patch and view the following pages to confirm that
columns containing dates sort correctly when using any setting of the
"dateformat" system preference:

- With the Mana service configured in system preferences, go to Serials
  -> New subscription and add a subscription for a bibliographic record
  which will match titles in Mana. In the Mana search results, the "Last
  import" column should sort correctly.
- Serials -> Claims
- Serials -> Search
- Serials -> Subscription details
  - The affected table is "Acquisition details," so your subscription
    must have orders associated with it (I eyeballed this change, so
    could use extra help testing this area).
- Serials -> Subscription details -> Serial collection

Signed-off-by: Amit Gupta <amitddng135@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>