[Form] Fixed CSRF error messages to be translated and added "csrf_message" option
merged branch bschussek/issue7642 (PR #7903)

This PR was merged into the master branch.

Discussion
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[Form] Fixed CSRF error messages to be translated and added "csrf_message" option

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #7642
| License       | MIT
| Doc PR        | TODO

Commits
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549a308 [Form] Fixed CSRF error messages to be translated and added "csrf_message" option