ref(core): button busy state and form SubmitButton UX #236266

Job	Run time
detect what files changed	11s
cli test	0s
prepare selective tests	0s
backend migration tests	0s
requirements check	0s
api docs test	0s
backend typing	0s
monolith-dbs test	0s
check migration	0s
api url typescript generation	0s
calculate test shards	0s
Backend	3s
backend test	0s
	14s

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