Bug 11125: Correct display for patron messaging preferences on OPAC

Bug 11125: Correct display for patron messaging preferences on OPAC

 To test :
 1) Remove 'sms' from message_transport_types table
 2) Go on OPAC "My messaging" tab => table columns are out of alignment with table heading
 3) Apply patch => table is correctly displaid

Signed-off-by: Koha team AMU <koha.aixmarseille@gmail.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit 7021d36d0e58fe2acd0ae4ee7c9e658df2cc74be)
Signed-off-by: Fridolin SOMERS <fridolin.somers@biblibre.com>