Simplify EventViewCreationAlgorithm(s)
Prompted by a discussion on a different MR, simplify the various EVCAs by removing an unnecessary step.
Following discussion with @tamartin, it seems that the step was intended to do something (attach RoI to EventContext) but this wasn't actually happening. Have now added code to ViewHelper.h so that it does now do that correctly.
Also removed a bunch of trailing whitespace