[FSSDK-11497] fire config update events synchronously (#1043) #1175

Job	Run time
lint	1m 28s
unit_tests (18)	2m 1s
unit_tests (20)	1m 46s
unit_tests (22)	1m 47s
lint_markdown_files / lint	50s
fullstack_production_suite / test	5s
integration_tests / test	4s
Coveralls coverage	3s
	8m 4s

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