More instrumentation (Camera/VO/Blockly/Idle Logging)

@kadst43 @BrettASwift 
Just want to mark these as I find them:
`vwf_view.kernel.application()` can become `appID`
if `currentCode` is already a string, the concatenation is not necessary.  If it's not, `currentCode.toString()` is preferred to avoid the memory allocation overhead of string concatenation.