Products.btreefolder2

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- Nothing changed yet.

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- Depend on ``Zope`` instead of ``Zope2``.

- Add a confirmation prompt on ``Delete All Objects`` button.
(see `9 <https://github.com/zopefoundation/Products.BTreeFolder2/issues/9>`_)

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- Drop support for Python 2.7, 3.5, 3.6.

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- Fix Python 2 incompatibility.

- Fix insidious buildout configuration bug for tests against Zope 4.

- Add support for Python 3.10 and 3.11.

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- Add support for Python 3.9

- Modernize the ZMI template to match the Zope 4 styles
(`10 <https://github.com/zopefoundation/Products.BTreeFolder2/issues/10>`_)

- Add ``Delete All Objects`` button to the manage screen.
(`9 <https://github.com/zopefoundation/Products.BTreeFolder2/issues/9>`_)

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- Specify supported Python versions using ``python_requires`` in setup.py
(`Zope481 <https://github.com/zopefoundation/Zope/issues/481>`_)

- Drop support for Python 3.4 since Zope itself does not support it.

- Add support for Python 3.8