Is it possible to add a column in the sequence editor? I would use this column for test numbers. I don't want to add the test numbers to the Step name unless I have to as it's not the cleanest solution.
You might
consider the comments or requirements columns. I believe you can add
columns to the Operator interface. You'd have to embed your test
numbers somewhere in the step so there would be something to show up in
that column. That would most likely be a step property and that would
require making custom step types that have a "test number" property. Or
you could find some existing property (like ReportText) to (mis)use.