Customization decision: Vanilla Crusades

Just needs an icon of some sort.

Also, this is one of those customization decision types that could theoretically be changed at any point in the campaign without any issue.  Other such customization decision ideas also exist (like *Hardcore Mode*).  Yet this is currently setup as a Day-1-only scenario decision.

I'm not sure how I'd like to present customizations that can be changed mid-campaign (a menu, I assume?).