.text-container {
  width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;

  padding: 10px;
  border: 1px solid #ccc;
}

Just copy and paste

.nav > li.dropdown.open {
    position: static;
}
.nav > li.dropdown.open .dropdown-menu {
    display:table; width: 100%; text-align: center; left:0; right:0;
}
.dropdown-menu>li {
    display: table-cell;
}

Just copy and paste

.rotate {
animation: rotation 1s infinite linear;
}

@keyframes rotation {
from {
transform: rotate(0deg);
}
to {
transform: rotate(360deg);
}
}