headerLImageCls

In column header cell there is not active left to title image.
If to set css class name than this image will become active.

Example

.phone {
  display: inline-block;
  width: 19px;
  height: 16px;
  background-image: url('data:image/svg+xml;charset=utf-8,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2216%22%20height%3D%2216%22%20viewBox%3D%220%200%2016%2016%22%20style%3D%22shape-rendering%3AgeometricPrecision%22%20fill%3D%22%23555555%22%20%20opacity%3D%220.5%22%3E%3Cpath%20fill-rule%3D%22evenodd%22%20d%3D%22M6.2223%2C2.8573%20C6.4953%2C3.1303%206.4953%2C3.5723%206.2223%2C3.8453%20L5.2333%2C4.8333%20C4.9603%2C5.1063%205.0863%2C5.4653%205.2333%2C5.8213%20C5.5833%2C6.6653%206.3453%2C7.5103%207.4163%2C8.5813%20C8.6103%2C9.7763%209.3313%2C10.3323%2010.1753%2C10.7653%20C10.5193%2C10.9413%2010.8913%2C11.0383%2011.1633%2C10.7653%20L12.1523%2C9.7783%20C12.4253%2C9.5053%2012.8673%2C9.5053%2013.1403%2C9.7783%20L15.1173%2C11.7563%20C15.3903%2C12.0293%2015.3903%2C12.4713%2015.1173%2C12.7443%20L13.0653%2C14.7953%20C12.8233%2C15.0373%2012.4423%2C15.0683%2012.1643%2C14.8693%20C12.1643%2C14.8693%208.1363%2C13.6693%205.2333%2C10.7653%20C2.2063%2C7.7373%201.1303%2C3.8303%201.1303%2C3.8303%20C0.9313%2C3.5523%200.9633%2C3.1713%201.2043%2C2.9303%20L3.2573%2C0.8793%20C3.5303%2C0.6063%203.9723%2C0.6063%204.2453%2C0.8793%20L6.2223%2C2.8573%20Z%22%3E%3C%2Fpath%3E%3C%2Fsvg%3E');
  background-repeat: no-repeat;
  position: absolute;
  left: 2px;
  top: 7px;
}
...
},{
  type: 'string',
  headerLImageCls: 'phone',
  cellAlign: 'right',
  sortable: false,
  title: 'Phone',
  index: 'phone'
},{

Sample on JSFiddle

Default

undefined