Copy eVars to Props in Admin Console

The majority of implementations I see all have a code block within the doPlugins function that simply copies eVars to props.  Since this is such a common occurrence, it makes sense to add an option when creating a conversion variable, to copy the value to a prop. 

I'm thinking something like:

I understand this will not be as easy as it seems, there will have to be rules on processing order and checks to make sure variables are available but I'll leave all that stuff up to the Product team.