Remove extraErrorsBlockSubmit flag on Form and make extraErrors always block validation #4964
Description
Prerequisites
- I have read the documentation
What theme are you using?
core
Is your feature request related to a problem? Please describe.
When the extraErrorsBlockSubmit flag was added back in the day, it was done to avoid a breaking change to how extraErrors affected the form submission.
Describe the solution you'd like
Given that users are likely to want them to block form submission, I recommend that we either remove the flag entirely OR change it to extraErrorsAreWarnings instead to switch the default behavior.
Describe alternatives you've considered
No response