This tests that focus will automatically move to aria-modal dialogs

PASS: Background is initially accessible.

Opening dialog1.
PASS: #new button is focused.

Opening dialog2.
PASS: #close button is focused.

Closing dialog2 and making dialog1 `ariaModal = true`.
PASS: #ok button is focused.

PASS successfullyParsed is true

TEST COMPLETE
Other page content with a dummy focusable element

Display a dialog

Dialog1 heading

OK  New