Scope :last-child margin rules to .tab

[honzajavorek]

When these rules are not scoped to .tab, they influence various other parts of the documentation:

[honzajavorek]

Actually, this change is a nonsense. The .tab should be somewhere inside the selectors, not in the beginning. I'm not sure where though, as I don't know the HTML output that well.

[honzajavorek]

I was able to fix it locally by adding following custom CSS:

.rst-content .section ul:last-child,
.rst-content .toctree-wrapper ul:last-child,
article ul:last-child {
  margin-bottom: 24px;
}
.rst-content .tab ul:last-child {
  margin-bottom: 0;
}