Fixes #36744 (closed) (see https://github.com/twbs/bootstrap/issues/36744#issuecomment-1186124342)
This PR proposes some changed for .btn-links to retrieve the same behavior from 5.1 regarding focus, active, hover and all combinations between those states.
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/CC @mdo - IMHO a fix for this one should be embedded if possible in the v5.2.0