Bug 8426: Diacritics not being mapped for searching

Bug 8426: Diacritics not being mapped for searching

Add mappings for ︡a to a, and for t︠ to t.

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 9140ea69150520f7a9b4fcc453020af91bd6ed38)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
(cherry picked from commit 9d321e0533f6e8e4d23d43eecd2cff7f1f6506ea)

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>