ul li.tab-drop {
position: absolute !important;
right: 0;
top: 0;
width: 100%;
box-sizing: border-box;
text-align: right;
z-index: 0 !important;
}

li.tab-drop > ul {
position: absolute;
right: 0;
min-width: 200px;
z-index: 1000;
display: none;
list-style: none;
text-align: left;
background: #FFFFFF;
text-align: right;
box-shadow: 0 1px 2px 0 rgba(0,0,0,0.25);
}

li.tab-drop > ul li {
float: none;
}