Add missing event name translations

We were always displaying the event names in English.

Note we're changing the `user_supported_budgets` key because it didn't
make much sense; the investments are supported, and not the budgets.

We're also adding "created" to most of the event names in order to make
the texts more explicit, since not all the events refer to created data.

app/components/admin/stats/budget_supporting_component.rb

@@ -30,6 +30,6 @@ class Admin::Stats::BudgetSupportingComponent < ApplicationComponent
     end
 
     def chart
-      @chart ||= Ahoy::Chart.new("user_supported_budgets")
+      @chart ||= Ahoy::Chart.new("budget_investment_supported")
     end
 end

app/models/ahoy/chart.rb

@@ -31,18 +31,14 @@ module Ahoy
     end
 
     def title
-      text = t("admin.stats.graph.#{event_name}")
-      if text.to_s.match(/translation missing/)
-        text = event_name.to_s.titleize
-      end
-      text
+      t("admin.stats.graph.#{event_name}")
     end
 
     private
 
       def records
         case event_name.to_sym
-        when :user_supported_budgets
+        when :budget_investment_supported
           Vote.where(votable_type: "Budget::Investment")
         when :visits
           Visit.all