HTML API: Add select handling #1438

Job	Run time
Core running from src / Core running from src / Linux	1m 52s
Core running from build / Core running from build / Linux	2m 6s
Core running from src / Core running from src / Windows	3m 5s
Core running from build / Core running from build / Windows	3m 14s
Core running from src / Core running from src / MacOS	3m 46s
Core running from build / Core running from build / MacOS	4m 11s
Gutenberg running from build / Gutenberg running from build / Linux	6m 24s
Gutenberg running from src / Gutenberg running from src / Linux	6m 22s
Gutenberg running from build / Gutenberg running from build / Windows	6m 11s
Gutenberg running from src / Gutenberg running from src / Windows	6m 11s
Gutenberg running from build / Gutenberg running from build / MacOS	6m 19s
Gutenberg running from src / Gutenberg running from src / MacOS	7m 17s
Leave WordPress Playground details	1s
Slack Notifications	1s
Failed workflow tasks	1s
	57m 1s

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