New options for ReorderTraces

In a follow up to this thread (https://www.wavemetrics.com/forum/general/function-flip-trace-order-gra…), I suggest additional options for the ReorderTraces operation.

// reorder traces in reverse order from current
ReorderTraces/W=... _reverse_
 
// reorder traces in alpha-numeric sort order
ReorderTraces/W=... _sort_

These new calls avoid the need for users to program with TraceNameList. It also avoids the issue that ReorderTraces cannot take a string list using quotation marks within its bracket list (as far as I see) and therefore needs to be called via Execute using a reconstructed command string. Both of the above can be called directly within function calls.