ambari-web/vendor/styles/bootstrap-combobox.css

.combobox-container {
    margin-bottom: 5px;
    *zoom: 1;
}

.combobox-container:before,
.combobox-container:after {
    display: table;
    content: "";
}

.combobox-container:after {
    clear: both;
}

.combobox-container input,
.combobox-container .uneditable-input {
    -webkit-border-radius: 0 3px 3px 0;
    -moz-border-radius: 0 3px 3px 0;
    border-radius: 0 3px 3px 0;
}

.combobox-container input:focus,
.combobox-container .uneditable-input:focus {
    position: relative;
    z-index: 2;
}

.combobox-container .uneditable-input {
    border-left-color: #ccc;
}

.combobox-container .add-on {
    float: left;
    display: block;
    width: auto;
    min-width: 16px;
    height: 18px;
    margin-right: -1px;
    padding: 4px 5px;
    font-weight: normal;
    line-height: 18px;
    color: #999999;
    text-align: center;
    text-shadow: 0 1px 0 #ffffff;
    background-color: #f5f5f5;
    border: 1px solid #ccc;
    -webkit-border-radius: 3px 0 0 3px;
    -moz-border-radius: 3px 0 0 3px;
    border-radius: 3px 0 0 3px;
}

.combobox-container .active {
    background-color: #a9dba9;
    border-color: #46a546;
}

.combobox-container input,
.combobox-container .uneditable-input {
    float: left;
    -webkit-border-radius: 3px 0 0 3px;
    -moz-border-radius: 3px 0 0 3px;
    border-radius: 3px 0 0 3px;
}

.combobox-container .uneditable-input {
    border-left-color: #eee;
    border-right-color: #ccc;
}

.combobox-container .add-on {
    margin-right: 0;
    margin-left: -1px;
    -webkit-border-radius: 0 3px 3px 0;
    -moz-border-radius: 0 3px 3px 0;
    border-radius: 0 3px 3px 0;
}

.combobox-container input:first-child {
    *margin-left: -160px;
}

.combobox-container input:first-child + .add-on {
    *margin-left: -21px;
}

.combobox-container select {
    display: inline-block;
    width: 0;
    height: 0;
    border: 0;
    padding: 0;
    margin: 0;
    text-indent: -99999px;
    *text-indent: 0;
}

.form-search .combobox-container,
.form-inline .combobox-container {
    display: inline-block;
    margin-bottom: 0;
    vertical-align: top;
}

.form-search .combobox-container .add-on,
.form-inline .combobox-container .add-on {
    vertical-align: middle;
}

.combobox-selected .combobox-clear {
    display: inline-block;
}

.combobox-selected .caret {
    display: none;
}

.combobox-clear {
    display: none;
    width: 14px;
    height: 14px;
    line-height: 14px;
    vertical-align: top;
    opacity: 0.3;
    filter: alpha(opacity = 30);
}

.dropdown:hover .combobox-clear,
.open.dropdown .combobox-clear {
    opacity: 1;
    filter: alpha(opacity = 100);
}

.btn .combobox-clear {
    margin-top: 1px;
    margin-left: 1px;
}

.btn:hover .combobox-clear,
.open.btn-group .combobox-clear {
    opacity: 1;
    filter: alpha(opacity = 100);

}

.typeahead-long {
    max-height: 300px;
    overflow-y: auto;
}

.control-group.error .combobox-container .add-on {
    color: #B94A48;
    border-color: #B94A48;
}

.control-group.error .combobox-container .caret {
    border-top-color: #B94A48;
}

.control-group.warning .combobox-container .add-on {
    color: #C09853;
    border-color: #C09853;
}

.control-group.warning .combobox-container .caret {
    border-top-color: #C09853;
}

.control-group.success .combobox-container .add-on {
    color: #468847;
    border-color: #468847;
}

.control-group.success .combobox-container .caret {
    border-top-color: #468847;
}

.combobox-container button.add-on {
    height: 30px;
    width: 30px;
}