[Paraview] Change of default Scale Mode in Glyph filter

[Moreland, Kenneth]

>Ken, the reason for this change was that if the "scale factor" was not
>setup properly, the glyphs would end up going crazy. e.g.
>+ Open can.ex2, all variables, apply
>+ Apply "Glyph" with everything default, except "Scale Mode" changed
>to "vector".
>+ Now step forward 1 timestep, it will render insanely large glyphs.

I guess that makes sense. I'll just need to go back and modify the
exercises in the tutorial to introduce the couple of steps to scale and
rescale.

-Ken