Miscellaneous corrections

htdocs/admin/tools/export.php

htdocs/comm/action/class/actioncomm.class.php

htdocs/compta/paiement/class/paiement.class.php

htdocs/compta/tva/index.php

htdocs/core/actions_sendmails.inc.php

htdocs/core/class/commondocgenerator.class.php

htdocs/core/class/commonobject.class.php

htdocs/core/class/html.form.class.php

htdocs/core/lib/date.lib.php

...e/modules/project/doc/doc_generic_project_odt.modules.php

...modules/project/task/doc/doc_generic_task_odt.modules.php

htdocs/user/class/user.class.php