.#{$prefix}grid-row-expander { background-image: theme-background-image('grid/group-collapse'); width: $row-expander-width; height: $row-expander-height; // This prevents IEQuirks from collapsing the icon's margin-top into the cell-inner's padding-top. // Without this, the icon moves upwards due to above collapsing effect. float: left; // This prevents IEquirks from stretching the icon div to accommodate the   at the grid cell's own specified line height. // Without this, the icon expands above its configured row-expander-height. line-height: 0; // Centers the icon within the standard sized row for the theme. margin: $row-expander-margin; } .#{$prefix}grid-row-collapsed { .#{$prefix}grid-row-expander { background-image: theme-background-image('grid/group-expand'); } }