Merge remote-tracking branch 'origin/3.9' into develop

htdocs/cashdesk/css/style.css

htdocs/contrat/card.php

htdocs/contrat/class/contrat.class.php

htdocs/fichinter/class/fichinter.class.php

htdocs/langs/en_US/projects.lang

htdocs/projet/activity/perday.php

htdocs/projet/activity/perweek.php

htdocs/projet/tasks/time.php

htdocs/theme/eldy/style.css.php

htdocs/theme/md/img/object_billa.png

htdocs/theme/md/img/object_billd.png

htdocs/theme/md/img/object_billr.png

htdocs/theme/md/style.css.php