Integrate Form Validation into HWebUI

[urs-of-the-backwoods]

The dojo toolkit is able to do on the fly form validation. Validation paramters are passed on widget creation. FRP widgets also could do additional validation. Develop a usable integration of both approaches and implement them in HWebUI. First information on form validation can be found here: http://dojotoolkit.org/reference-guide/1.9/dijit/form.html.