Allow custom tags with new TWebControl('custom').

[sergeymorkovkin]

TWebControlConstructor isn't used for something. So I propose to let Prado programmers use it's optional parameter for creating webcontrols with custom tags. For example, in my project I need to create legend tag and there is no TLegend control.

It would be very handly to write something like: $this->_tagLegend = new TWebControl('legend');

Am I convincing enough?

[maddin]

We can also add an extra control for that:

class THtmlTag extends TWebControl
{
	public function getTagName()
	{
		return $this->getViewState('TagName',parent::getTagName());
	}
	
	public function setTagName($tag)
	{
		$this->setViewState('TagName',TPropertyValue::ensureString($tag));
	}
}

[xue]

Added THtmlElement for this purpose.