add a hint tag to specify which array to use for default color of the output
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
Add a "Hint" tag that can be used in the xml files to specify a given array (typically, this would point to the "ActiveScalars", "ActiveVectors"... ). This array will then be used to color the output by defaut.
hard-coding the array name could aslo be supported.