Administration: Update site icon and media control button styling #24650

Job	Run time
Determine Matrix	3s
Single Site Memcached / Test before	4m 18s
Multisite Memcached / Test current	13m 57s
Single Site Default / Test current	13m 23s
Single Site Memcached / Test current	13m 27s
Single Site Default / Test before	2m 59s
Multisite Memcached / Test before	3m 11s
Multisite Default / Test before	3m 7s
Multisite Default / Test current	14m 11s
Slack Notifications	0s
matrix.label	0s
Failed workflow tasks	-1s
	1h 8m 35s

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