browser/libs/ui-components/data-grid/filter/common.css

.filter-container {
  margin-bottom: 1.5em;
}

.filter-container h3 {
  margin: 0;
  margin-bottom: -10px;
}

.filter-container h3 {
  font-size: 1em;
  color: #9e9e9e;
  font-weight: normal;
}