.tree {
    min-height: 20px;
    padding: 19px;
    width: 850px;
    overflow: auto;
    float: left;
    padding: 3px;
}

.tree li {
    list-style-type:none;
    margin:0;
    padding:10px 5px 0 5px;
    position:relative
}
.tree li::before, .tree li::after {
    content:'';
    left:-20px;
    position:absolute;
    right:auto
}
.tree li::before {
    border-left:1px solid #999;
    bottom:50px;
    height:100%;
    top:0;
    width:1px
}
.tree li::after {
    border-top:1px solid #999;
    height:20px;
    top:25px;
    width:25px
}
.tree li span {
    -moz-border-radius:5px;
    -webkit-border-radius:5px;
    border:1px solid #999;
    border-radius:5px;
    display:inline-block;
    padding:3px 5px;
    text-decoration:none
}
.tree li.parent_li>span {
    cursor: pointer;
    background-color: rgba(86,61,124,.15);
}
.tree>ul>li::before, .tree>ul>li::after {
    border:0
}
.tree li:last-child::before {
    height:30px
}
.tree li.parent_li>span:hover, .tree li.parent_li>span:hover+ul li span {
   color: #fff;
    background-color: #563d7c;
    border:1px solid #563d7c;
    color:#ffffff
}
.tree .parent_li>ul>li{
display: none;
}
.toDelete,.toInstall  {
    display: inline-block;
    width: 14px;
    height: 14px;
    line-height: 14px;
    vertical-align: text-top;
    background-repeat: no-repeat;
    margin-top: 1px;
    margin-right: 3px;
}

.toDelete {
    background-image: url("../img/erase.png");
}

.toInstall {
    background-image: url("../img/redo.png");
}
.resolve,.refresh, .to-be-removed {
    background-repeat: no-repeat;
    vertical-align: middle;
    margin-top: 5px;
    margin-left: 2px;
    background-color: white;
    box-shadow: none;
    width: 20px;
    height: 20px;
    border-radius: 4px;
    cursor: pointer;
    display: inline-block;
}
.resolve {
    background-image: url("../img/circ.png");
}

.to-be-removed {
    background-image: url("../img/warning.png");
}

.refresh {
    background-image: url("../img/refresh.png");
    margin-left: 5px;
    visibility: hidden;
}
.loading {
    background-image: url("../img/loading.gif");
}