.mod-data-input .mdl-left {
    display: none;
}

.nav-tabs a[href*="edit"]::before {
content:"  ▶ ";
animation: opacity 1s ease-in-out infinite;
    opacity: 1;  
}

@keyframes opacity {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
  100% {
    opacity: 0;
  }
}