Terms list table: the Quick Edit link should be a button

[afercia]

As done for the Posts list in #38677, the Quick Edit link should be a button. Currently, it uses a JS-generated role="button" attribute, but marking it up directly as button is preferable.

Also, it would benefit from an aria-expanded attribute to communicate to assistive technologies the expanded / collapsed status of the Quick Edit form. This would bring it in parity with what has been done for the Posts list Quick Edit in #38677 / [42725].

[afercia]

43382.diff​ proposes the same changes already introduced for the Posts Quick Edit link in in #38677 / [42725].

[afercia]

In 42727:

Accessibility: Change the terms "Quick Edit" link to a button.

For better accessibility and semantics, user interface controls that perform an
action should be buttons. Links should exclusively be used for navigation.
See #38677 / [42725].

Fixes #43382.

[afercia]

In 42767:

Accessibility: Change the comments "Quick Edit" and "Reply" links to buttons.

For better accessibility and semantics, user interface controls that perform an
action should be buttons. Links should exclusively be used for navigation.

Props Cheffeid, audrasjb, afercia.
See #43382, #38677.
Fixes #43376.

[atimmer]

In 45553:

Comments: Open comment quick edit on double click.

In [42767] the quick edit button changed from a link to a button. This caused the jQuery code that selects on a link to no longer work. This commit restores the previous behavior.

Fixes #47572.
See #43382, #38677.