<div class="ui-grid-cell-contents ui-grid-header-cell-primary-focus" style="padding: 0;">
  <span class="ui-grid-header-cell-label">
    <span class="ui-grid-header-cell-title">{{ header.displayName || 'Loading'}}<md-tooltip>{{ header.headerTooltip || 'Loading'}}</md-tooltip></span>
    <span ng-if="header.dataType" style="display: block;">{{ header.dataType || ''}}</span>
  </span>
  <span>
    <i ng-class="{'ui-grid-icon-up-dir': header.sort.direction == 'asc', 'ui-grid-icon-down-dir': header.sort.directi