CocoRoboDesktop/kityminder/ui/theme/default/css/_history.less

.command-button {
    &.undo, &.redo {
        float: left;
        border: none;
        width: @panel-height;
        height: @panel-height;
        line-height: @panel-height;
        padding: 0;
        margin: 0;

        .fui-label {
            display: none;
        }

        .fui-icon {
            display: block;
            width: @panel-height;
            height: @panel-height;
            background: url(../images/history.png) no-repeat;
        }

        &:hover {
            background: @tab-hover;
            .fui-icon {
                background-position-y: -40px;
            }
        }
        &:active {
            background: @tab-active;
        }

        &.fui-disabled {
            &:hover, &:active {
                background: none;
            }
            .fui-icon {
                background-position-y: 0;
            }
        }
    }

    &.undo {
    }

    &.redo {
        .fui-icon {
            background-position-x: -40px;
        }
    }
}