HNode needs a new layout and a different styles

[akevalion]

when users create HNodes they can specify the type of nodes they want of even extent for new types of nodes.
These are the styles:

• the normal node with box for children and box for the title, with the highlight in the title.
• one simple box with border, and title
• one simple box without border and title
• consider also the border width and the dash array.
  Check this photo to see the progress