UIQM-743: Prevent `handleSubmit` from running if there is any validation issue, instead of using the `complete` form API. #148

Job	Run time
ui / Set shared variables	1s
ui / Run Bigtest tests	0s
ui / Compile translations / Compile translations	39s
ui / version-number / Get CI version number	4s
ui / Run Jest tests / Run Jest tests	2m 13s
ui / Install and lint / Install and lint	1m 32s
ui / Generate module descriptor / Generate module descriptor	32s
ui / Okapi dependency check (main branch/release only)	0s
ui / Publish module descriptor (main branch/release only)	0s
ui / Publish module (main branch/release only)	0s
ui / SonarCloud analysis / SonarCloud analysis	46s
	5m 47s

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