fronend/scss/_tooltippopovers.scss

.tooltip {
    font-size: 13px;

    .tooltip-inner {
        @include border-radius(0);
    }
}

.popover {
    @include border-radius(0);
    border: 1px solid rgba(0, 0, 0, 0.08);

    .popover-title {
        font-weight: bold;
        @include border-radius(0);
        background-color: #e9e9e9;
        border-bottom: 1px solid #ddd;
    }

    .popover-content {
        font-size: 13px;
        color: #777;
        @include border-radius(0);
    }
}