code cleaning : get rid of quick-and-dirty circular dependency fix by moving some code in separated file

#7422 : change variable names in delete_pair_core and use suppleant_member_id to find member to unsubscribe instead of email matching

#7325 : use suppleant_member_id instead of parent_id or is_associated_people to perform binom checks

quick fix to prevent dates whose 4 letters year starts with 0 to be considered valid on new member inscription

This reverts merge request !266

This reverts merge request !267

allow bdm to configure a message that is displayed when a member selects a creneau matching (day of week, time) from member space

do not fetch res_partner with parent_member_num when looking for members with short option (associated to a search from brinks)

fix computation of new makeups_to_do of titulaire when creating pair by taking into account already selected makeups of suppleant

ajout nouveau champ configurable au process d'inscription : profession (champ également rendu modifiable post circuit d'inscription depuis l'espace membre)

admin makeups hot fix : remove checkbox for ftop members so that we can not do -1 makeup mass action