CaracoleBundle/Resources/assets/app/switchmerchant/switchmerchant_admin.scss

body.admin {
  .nav-switch-merchant {
    width: 220px ;
    text-align: right ;

    .fa {
      position: relative;
      top: -4px;
      right: 7px;
    }

    form.switch-merchant {
      display: inline-block ;
      width: 180px ;
      position: relative ;
      top: 7px ;
      text-align: left ;

      label, .select2-selection__clear {
        display: none ;
      }
    }
  }
}