Fix an overflow issue with dropdown fields. Closes #204

RIGS/templates/RIGS/event_form.html

@@ -63,6 +63,7 @@
                         } else {
                             $('.form-is_rig').slideDown();
                         }
+                        $('.form-hws').css('overflow', 'visible');
                     } else {
                         $('#{{form.is_rig.auto_id}}').prop('checked', false);
                         $('.form-is_rig').slideUp();