A bunch of FormUI-related goodness.
Make FormUI forms include and validate WSSE fields by default.
Potentially use the wrapping label text as the field name in validation errors.
Allow errors on all controls in a form to be displayed as session errors rather than control wrap errors.
Add a clear() method to controls so that they can be cleared after submission.
Load, process, and save container values, too, using their parent control methods.
Add an each() method to apply a function to every control in a container.
Use a real array instead of SessionStorage.  Fixes a lot of dumb PHP problems.
Use FormUI to build the form to add a new user in the admin.
The form to delete existing users needs to be refactored.