[vtkusers] Blinking actors during picking

[John Biddiscombe]

> the vtkTextProperty, not in the actor. Since nobody likes to be 
> Biddiscombe'd I'll keep the functionalities already there :), 
> like being 
> able to justify against a box, not just a point :)

Blinkin' flip Guv'nor.

If you wish to remove the options I added, then please feel free to
remove them, but please provide a mechanism so that the user can (for
example), click on some text, have a box appear - then drag the box to
some arbitrary size, and the text be scaled to fit/justified in the box.
The reason I added the previous crufty stuff was to allow this
behaviour. It was inteded to facilitate the use of a generalized widget
for picking 2D actors and sizing/moving them.

If you can provide a similar mechanism via a different way, then please
do.

JB
PS. Everybody likes to be Biddiscombe'd :)