Form attribute "includeContext" is being inserted as a dynamicAttribute

If you use the "includeContext" attribute on the Form element, it shows up as an attribute on the rendered html form. This is because UIBean.getStandardAttributes() only includes "String" and list type attributes, but includeContext is a boolean.

<@s.form action="myAction" includeContext=false>

Can either fix by making includeContext a String (like validate is in Form), or having UIBean.getStandardAttributes() correctly detect it.