FIO 7603 Edit Grid With Empty Rows Not Submitting Form

Link to Jira Ticket

Added check for openWhenEmpty on submission to allow empty rows.

Why have you chosen this solution?

Previous code did not allow form submission on empty rows even when openWhenEmpty flag is enabled.

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Tested manually and with unit tests.

[x] I have completed the above PR template
[x] I have commented my code, particularly in hard-to-understand areas
[x] I have made corresponding changes to the documentation (if applicable)
[x] My changes generate no new warnings
[x] My changes include tests that prove my fix is effective (or that my feature works as intended)
[x] New and existing unit/integration tests pass locally with my changes
[x] Any dependent changes have corresponding PRs that are listed above