Mention in docs suggested CSS for changing the cursor in tabs and pagination

[cesarandreu]

I looked at some of the issues and PRs and there's a few that mention this. From what I saw, it was agreed that it should be done in the user's CSS. However, it doesn't appear to be mentioned anywhere in the documentation.

I suggest mentioning it in the documentation so that the common user is aware and can add it in. Maybe include some example?

I'm not sure if it's the correct way, but I added the following to my CSS in order to get tabs to change the cursor:

.nav a {
  cursor: pointer;
}