Minor esthetic fixes

htdocs/comm/action/card.php

htdocs/core/class/html.formmargin.class.php

htdocs/core/tpl/resource_view.tpl.php

htdocs/projet/list.php

htdocs/resource/element_resource.php

htdocs/theme/eldy/img/object_calendargantt.png

htdocs/theme/eldy/img/object_calendarpertype.png

htdocs/theme/eldy/img/object_resource.png

htdocs/theme/eldy/style.css.php

htdocs/theme/md/img/object_calendargantt.png

htdocs/theme/md/img/object_calendarpertype.png

htdocs/theme/md/img/object_calendarperuser.png

htdocs/theme/md/style.css.php