Update remaining usages of `Smile`/`CommentSmile`

app/controllers/static_controller.rb

@@ -33,7 +33,7 @@ class StaticController < ApplicationController
     @questions = Question.count
     @answers = Answer.count
     @comments = Comment.count
-    @smiles = Smile.count + CommentSmile.count
+    @smiles = Appendable::Reaction.count
   end
 
   def linkfilter

spec/controllers/ajax/smile_controller_spec.rb

@@ -47,7 +47,7 @@ describe Ajax::SmileController, :ajax_controller, type: :controller do
         end
 
         it "does not create a smile" do
-          expect { subject }.not_to(change { Smile.count })
+          expect { subject }.not_to(change { Appendable::Reaction.count })
         end
 
         include_examples "returns the expected response"
@@ -238,7 +238,7 @@ describe Ajax::SmileController, :ajax_controller, type: :controller do
         end
 
         it "does not create a smile" do
-          expect { subject }.not_to(change { CommentSmile.count })
+          expect { subject }.not_to(change { Appendable::Reaction.count })
         end
 
         include_examples "returns the expected response"