get nonform to work with HTMLUnit

From the Blueprint for non-forms. Get them to work in HTMLUnit, which appears easier at this time as the code doesn't rely too much on an actual form to be selected. Once it works then get it to work in Selenium.

This should be a change in UpdateForm to allow specifying non-forms. A special flag should be provided to the backend to indicate that a non-proper form will be used. The objective here is that under normal use only a normal Form should be selectable, anything else would generate an error. In the special mode however anything can be selected.