use the 3d arrows by default

Common/DefaultOptions.h

@@ -1023,7 +1023,7 @@ StringXNumber ViewOptions_Number[] = {
   { F|O, "Type" , opt_view_type , DRAW_POST_3D ,
     "Type of graph (1=3D, 2=2D-space, 3=2D-time)" },
 
-  { F|O, "VectorType" , opt_view_vector_type , DRAW_POST_ARROW ,
+  { F|O, "VectorType" , opt_view_vector_type , DRAW_POST_ARROW3D ,
     "Vector display type (1=segment, 2=arrow, 3=pyramid, 4=3D arrow, 5=displacement)" },
   { F,   "Visible" , opt_view_visible , 1. ,
     "Is the view visible?" },

doc/texinfo/opt_general.texi

@@ -631,7 +631,7 @@ Saved in: @code{-}
 
 @item General.VectorType
 Default vector display type (for normals, etc.)@*
-Default value: @code{2}@*
+Default value: @code{4}@*
 Saved in: @code{General.OptionsFileName}
 
 @item General.Verbosity

doc/texinfo/opt_view.texi

@@ -311,7 +311,7 @@ Saved in: @code{General.OptionsFileName}
 
 @item View.VectorType
 Vector display type (1=segment, 2=arrow, 3=pyramid, 4=3D arrow, 5=displacement)@*
-Default value: @code{2}@*
+Default value: @code{4}@*
 Saved in: @code{General.OptionsFileName}
 
 @item View.Visible