Unsetting url both with & w/o ->base to allow proper handling when app not hosted at server's DocumentRoot
A better fix for issue #2711. Allows url to be unset from request array regardless of this->base context
Merge remote-tracking branch 'upstream/master'
Merge pull request #2866 from paddythenerd/master

Unsetting url both with & w/o this->base to allow proper handling when app n...
Fix postLink() & postButton() with nested data.

Flatten deeply nested array data before generating hidden inputs.
This solves 'Array to string conversion' errors.

Closes #2894