Make pricing page consistent in talking about MoU

We shouldn’t tell people on one page (the terms page) that we know about
their organisations agreement and then on the pricing page tell them to
contact us to find out what we know about the agreement.

So this commit adds the same logic from the terms page to the pricing
page, with wording that makes sense in the pricing context.

app/main/views/index.py

@@ -52,6 +52,7 @@ def pricing():
             for cc, country in INTERNATIONAL_BILLING_RATES.items()
         ], key=lambda x: x[0]),
         search_form=SearchTemplatesForm(),
+        agreement_info=AgreementInfo.from_current_user(),
     )