Toolbar: apply default color scheme to front-end admin bar #29991

Job	Run time
Core running from src / Linux	1m 38s
Core running from src / MacOS	1m 31s
Core running from build / Linux	1m 32s
Core running from src / Windows	3m 47s
Core running from build / MacOS	1m 13s
Core running from build / Windows	2m 59s
Slack Notifications	-1s
Failed workflow tasks	0s
	12m 39s

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