Audit changes in investment translations

Note the user interface could certainly be improved, as it doesn't show
which languages have changed.

app/controllers/admin/budget_investment_audits_controller.rb

@@ -1,7 +1,7 @@
 class Admin::BudgetInvestmentAuditsController < Admin::BaseController
   def show
     investment = Budget::Investment.find(params[:budget_investment_id])
-    @audit = investment.audits.find(params[:id])
+    @audit = investment.own_and_associated_audits.find(params[:id])
 
     render "admin/audits/show"
   end