Fix connector config form validation mode

[superflo22]

• Breaking change? (if so, please describe the impact and migration path for existing application instances)

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• I have performed a self-review of my own code
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• My changes generate no new warnings (e.g. Sonar is happy)
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fixes #514

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[Haarolean]

Can we have a test for this please?

[superflo22]

I guess in the test should be as an Class extending BasePage in the connectors folder?

Any tips?

[Haarolean]

I guess in the test should be as an Class extending BasePage in the connectors folder?

Any tips?

@kafbat/frontend any suggestions here please?

[yeikel]

This has been stale for a while. Is the current issue that a UI/E2E test needs to be added?

[Haarolean]

@yeikel yeah. A unit test for the frontend should suffice.