* Update semantics for ActivityPanel
Move the Section wrap to the top-level of ActivityPanel
Use an `aside` for the panel, which will expose the panel as a “complementary” in landmark nav
Add a heading for the Section/aside, which also fixes the heading hierarchy
* Update textdomains to match woo-dash change
* Switch panel container to a `div` so that clickOutside works as expected
99f726bfb5