VI Analyzer: Add option to "VI Documentation" to skip .ctl's

[joerg.hampel]

For the "VI Documentation" test, it would be great to have an option to skip controls (.ctl). We never add VI Documentation to typedefs or other controls. 

(cross-posted to VI Analyzer Enthusiasts)

[McQuillan]

I'm unsure how I feel about this one. I try to give a very short description to controls just to remind me what the intended use-case was. Helping Future You as Fab would say!

However, I do think there should be better native scripting support generally to separate VIs and Controls. For example, when you get a list of owned VIs in a library, it returns VIs and Controls, which you then have to run a further check on.