Fixed /admin/pages/publishall link in docs
DateField.js event selector regression (fixes #1528)

See 19a8545076f477d15aa5ed7fe52af020f43d28ab
Revert deprecation of Object::add_extension() usage

This reverts commit 14b997eea3c2a541fe842025b4f7ff76bd74fba9.
Its just not practical to use the Config API as it stands,
the add_extension() wrapper does more than just a Config->update().

Most use cases can be covered via YML, but any conditional
additions (e.g. in unit tests) can still benefit from the
add_extensions() shorthand.
API: used call_user_func_array in order to have an arbitrary number of parameter for getFormattedImage (fixes #1752)
Merge pull request #1753 from g4b0/1752-image-manipulation-parameter

API: used reflection in order to have an arbitrary number of parameter
l10n key to make "yes" and "no" translatable (see #1749)
Merge remote-tracking branch 'origin/3.0' into 3.1

Conflicts:
	docs/en/reference/urlvariabletools.md
	tests/forms/CheckboxFieldTest.php