Merge branch '5.0' of git@github.com:Dolibarr/dolibarr.git into develop

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...emo/documents_demo/societe/contact/12/photos/Einstein.jpg

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..._demo/societe/contact/12/photos/thumbs/Einstein_small.jpg

dev/initdemo/mysqldump_dolibarr_5.0.0.sql

htdocs/adherents/class/adherent.class.php

htdocs/comm/propal/card.php

htdocs/comm/propal/class/propal.class.php

htdocs/commande/class/commande.class.php

htdocs/compta/bank/class/account.class.php

htdocs/compta/facture/class/facture.class.php

htdocs/compta/localtax/class/localtax.class.php

htdocs/compta/paiement/cheque/class/remisecheque.class.php

htdocs/compta/salaries/class/paymentsalary.class.php

htdocs/compta/sociales/class/chargesociales.class.php

htdocs/compta/tva/class/tva.class.php

htdocs/contrat/class/contrat.class.php

htdocs/install/mysql/migration/4.0.0-5.0.0.sql