dojox.form.manager._Mixin doesn't set radio button values properly

[ben hockey]

using the test_Manager1.html test page try the following in the firebug console:

dijit.byId("form").formWidgetValue('w02', 'w02-1')

you'll see that the w02-2 radio button is unchecked but w02-1 does not get checked.

i also checked this in dojo 1.4.3 and this same problem exists in that version.

[ben hockey]

formAction.html from dijit.form.Form unit tests

[ben hockey]

adaptation of dijit.form.Form unit test to help test some of dojox.form.Manager

[ben hockey]

i added a couple of files that might help with testing/identifying this problem. these are just an adaptation of the unit tests for dijit.form.Form. using these, i also found that checkboxes are also not working as expected.

[Eugene Lazutkin]

It looks like dijit.form widgets are far from stable, and not exactly regular. I need to special-case both dijit.form.CheckBox and dijit.form.RadioButton now. And replace attr() with appropriate get() and set() calls. I am not sure how well it works with priorityChange from #11284. And if all form widgets were converted to new get/set schema. If some dojox widgets are still define attr() instead of new API they'll break the form manager.

[Eugene Lazutkin]

(In [22385]) form.manager: updated the API from using now depricated attr() to get()/set(), adapted changes to dijit.form.RadioButton and dijit.form.CheckBox, thx neonstalwart!, !strict, fixes #11261.