Distinguish Visitor IDs in DigitalPulse Debugger

[#1]

DigitalPulse Debugger shows both fid and vid as "Visitor ID" in Friendly Format. It would be nice to tell them apart, for example, "Visitor ID (fid)" and "Visitor ID (vid)".

[#2]

Archiving this, as it should no longer be applicable with the new debugging capabilities currently in beta.