[Form] Errors now reference the field they were added to and the violation/exception that caused them
feature #9993 [Form] Errors now reference the field they were added to and the violation/exception that caused them (bschussek)

This PR was merged into the 2.5-dev branch.

Discussion
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[Form] Errors now reference the field they were added to and the violation/exception that caused them

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #9472, #9582
| License       | MIT
| Doc PR        | -

Commits
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c8a0ee6 [Form] Errors now reference the field they were added to and the violation/exception that caused them