Previously they did not always work correctly (and were not always consistent with each other), depending on the combination of choices that were
made on the form. This commit should fix those issues, and also adds two helper functions that make it easy to correctly add new AJAX-enabled
elements to this dynamic form.

Rewrite the Views contextual links implementation to fix a number of bugs and user experience issues, and to make it more flexible.

This patch is up for review at http://drupal.org/node/876772#comment-4125508 and could undergo changes as a result of that, but I am committing it
here so it we can test and develop against it.

Further work on arguments (styling for dependent elements, cleaner validation settings, a few bugs killed)

Tests for the dynamic appearance of the "tagged with" form element on the wizard, to make sure it doesn't break again :)

Fix the ability of the "tagged with" field to dynamically appear and disappear on the wizard as appropriate, and update the tests.

1024586 by merlinofchaos, dereine: Provide a way to move old fields in views data. Additional move field-api data to it.

#1024586 by merlinofchaos, dereine: Provide a way to move old fields in views data. Additional move field-api data to it.