Add filter that creates block id variables
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
We need a filter that creates intelligent block ids. This new variable needs to be sorted in increasing order, as well as random order.
The reason that the current blockid doesn't work is that users often use block IDs that that group blocks together, but are not all monotonically increasing. For instance, you could have block counts of 1,2,3,10,11,12,20,21,22,100,and 101. Obviously, we want the Color Legend (and color range) to go from 1 to 10, not 1 to 100.