Add thank you note frontend

config/locales/en.yml

@@ -449,6 +449,8 @@ en:
     show_unsolved: "Unvsolved requests"
     solved: "This question has been answered"
     comment_exercise: "I would like to give feedback for this exercise"
+    write_a_thank_you_node: "If you want, you can write a thank you note to all commentors:"
+    send_thank_you_note: "Send"
   sessions:
     create:
       failure: Invalid email or password.