.wj-flexgrid {
  max-height: 250px;
}

/* show images on filtered columns */
.custom-icons .wj-glyph-filter {
    background-image:url('http://icons.iconseeker.com/png/fullsize/aspnet/filter-1.png');
    background-repeat: no-repeat;
    background-position: bottom right;
    margin-top: 4px;
    width: 1em; height: 1em;
    border: none;
}
.custom-icons .wj-glyph-filter:after {
    display: none;
}
/* make active filter images 25% larger */
.custom-icons .wj-filter-on .wj-glyph-filter {
    transform: scale(1.25)
}

/* change the color of the filter glyphs */
.custom-colors .wj-glyph-filter {
    color: red;
    font-size: 125%;
}