Meta Post - Common CSS Hacks

@Shamama 0.815 should be this

.tree-view-item-children {
  margin-left: 20px;
  border-left: 1px solid rgba(153,153,153,0.5);
  border-radius: 5px;
  transition:all 0.5s ease-in-out;
}
.tree-view-item-children:hover {
  border-left-color: rgba(153,153,153,0.8);
}
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