.table-wrapper {
  overflow: auto;
  overflow-y:auto;
}

.table-wrapper table {
  position: relative;
  border: 1px solid #ddd;
  border-collapse: collapse;
}

.table-wrapper th, .table-wrapper td {
  border: 1px solid #ddd;
  vertical-align: middle !important;
}

.table-wrapper th {
  background-color: #eee;
  position: sticky;
  top: -1px;
  z-index: 2;
}

#scrollable-dropdown-menu .dropdown-menu {
   max-height: 275px;
   overflow-y: auto;
 }