[Checkins] [zopefoundation/zope.app.form] f409e4: Restore ConfigurationError.

[Steffen Allner]

  Branch: refs/heads/fix-zope.configuration
  Home:   https://github.com/zopefoundation/zope.app.form
  Commit: f409e4d42634f2d16536028e3c9c6474a2323cbc
      https://github.com/zopefoundation/zope.app.form/commit/f409e4d42634f2d16536028e3c9c6474a2323cbc
  Author: Steffen Allner <sa at gocept.com>
  Date:   2020-05-21 (Thu, 21 May 2020)

  Changed paths:
    M src/zope/app/form/browser/metaconfigure.py

  Log Message:
  -----------
  Restore ConfigurationError.

This has nothing to do with XML.