fix css button 'Suivi', admin view, unit tests

classes/form/edittable_form.php

classes/output/course_format_iena_table_option.php

classes/output/renderer.php

db/install.xml

db/upgrade.php

styles.css

suivi_edit.php

suivi_unit.php

templates/suivi-edit.mustache

templates/suivi.mustache

tests/my_test.php

version.php