EDD Module: Variable pricing and strikethrough

[kimcoleman]

Is your feature request related to a problem? Please describe.
For EDD products, we show prices as strikethrough if the code is automatically applied. If the product is variable, though, we have put code in place not to show the strikethrough pricing. We need a solution that handles this behavior for variable price products.

Describe the solution you'd like
Handle strikethrough pricing on variable products according to discount code rules using the edd_get_variable_prices hook.