superset/caravel/assets/stylesheets/welcome.css

.table i {
  padding-top: 6px;
}

img.loading {
    width: 25px;
}

.welcome table {
    display: none;
    width: 100%;
}

input {
    margin-left: 5px;
    margin-top: 8px;
}

.panel-body {
    overflow: auto;
}