Make overflow visible inside bootstrap dropdown

accordion.less

// [...]

// Custom rule to get dropdowns and the like to display outside of the body
// credits: ScottS on stackoverflow
// source: http://stackoverflow.com/questions/10959068/twitter-bootstrap-accordion-and-button-dropdown-overflow-issue
.accordion-body {
  &.in {
    &:hover {
      overflow: visible;
    }
  }
}