Added mini trait block display panel in behavior block

When a trait is dropped in a behavior block, a mini 70x30 (default)
panel is added to the behavior block label (instead of the entire
trait block). The panel looks very much like a mini trait block.

Also, deprecated use of trait block (tBlockNew) inside behavior
block. Behavior block only needs the trait name from the trait
block, so only that string is saved and used where needed. A future
patch will remove all references to tBlockNew (even from comments).