Bug 24046: Untranslatable 'Activate filters'

Bug 24046: Untranslatable 'Activate filters'

Bug 9573 moved the code for the table filters activation to it's
own javascript file. The strings contained in this file are not
translatable. This patch moves the strings to the datatables
include file since the filters are related to datatables.

Test plan:
Visit the catalogue/detail.pl and reports/itemslost.pl and test
that the 'Activate/Deactivate filters' option still work correctly.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>