Wizard 'Insert Tag' opened on drop from Palette should show preferable attributes when available.

Palette item in 'start text' attribute contains jsp/html tag with some its attributes, e.g. <dataTable value="|" var="">. These attributes should be treated by UI as preferable and wizard 'Insert Tag' should display to tabs 'General' and 'Advanced', where 'General' lists required and preferable attributes and 'Advanced' lists all attributes. At present, wizard treats only required attributes, e.g. for h:message, but in most cases tags have no required attributes, and wizard displays only the complete list of all attributes which often has too many items (e.g. h:commandButton has 34 attributes, while palette defines 2 preferable: 'action' and 'value').