The row actions links should be buttons

[afercia]

See also #3

Currently, the row actions links are rendered as links, for example:
<a aria-label="Unapprove this comment" class="vim-u vim-destructive" href="#">Unapprove</a>

However, they don't point to a real resource, instead they perform an action. Also, as far as I see there's no "Edit" screen to point to any longer, that was one of the very few cases where a link was appropriate. Many of these links in WordPress are still inks because of the no-js fallback: when JS is disabled they actually behave like links. In this case though, everything is JS-based so they should be buttons.

See also the decision logic summarized in the a11y standards: https://make.wordpress.org/core/handbook/best-practices/coding-standards/accessibility-coding-standards/#semantics-for-controls

Making them buttons will also give a little advantage: no need to pass the event to prevent the default links action (scroll because of the # anchor).

[rmccue]

Annoyingly, all the styles in core we're using require a, so they will all need to be patched.

Punting this for now, but will revisit once we support multiple list tables, because the styles need to rewritten to be generic across all list tables anyway.