usage-statistics-impl/resources/buildServerResources/css/usageStatistics.css

.statisticGroup {
  width: 49%;
  padding-bottom: 10px; /* if you want to use margins here make sure you updated BS.UsageStatistics.sortGroups() JS method */
}

.statisticGroup .settingsBlockContent {
  width: 100%;
}

.statisticGroupLeft {
  float: left;
  clear: left;
}

.statisticGroupRight {
  float: right;
  clear: right;
}

.statisticGroupInner {
  width: 100%;
  max-height: 450px;
  overflow-y: auto;
}

table.borderBottom .statisticRow.noBorder td {
  border-bottom: none;
}