Add tooltips

[tommaitland]

Something like

//
// Tooltips
// --------------------------------------------------

[data-tooltip] {
    position: relative;
    cursor: pointer;
    .inline-block();

    &:before,
    &:after {
        .transition(all 0.2s ease-out);
        position: absolute;
        visibility: hidden;
        opacity: 0;
    }

    &:before {
        .arrow-up(7px, @textColor);
        content: '';
        left: 50%;
        margin-left: -3.25px;
        z-index: 10001;
        bottom: -10px;
    }
    &:after {
        .box-sizing(border-box);
        content: attr(data-tooltip);
        padding: 0.5em 0.75em;
        border-radius: 3px;
        font-size: 0.875em;
        z-index: 10000;
        left: 50%;
        margin-left: -5em;
        margin-top: 10px;
        width: 10em;
        line-height: 120%;
        background: @textColor;
        color: @baseColor;
    }
    &:hover:before,
    &:hover:after {
        visibility: visible;
        opacity: 1;
    }

    &.tax-tooltip {
        &:after {
            width: 20em;
        }
    }
}

[tommaitland]

Added with commit 8e2ee87