Allow liking/unliking when JavaScript is disabled

Even if pretty much nobody uses a browser with JavaScript disabled when
navigating our sites, there might be times where JavaScript isn't loaded
for reasons like a slow internet connections not getting the JavaScript
files or a technical issue.

So we're making it possible to still use the like/unlike buttons in
these cases.

config/locales/en/responders.yml

@@ -17,6 +17,7 @@ en:
         support: "Investment supported successfully"
         topic: "Topic created successfully."
         valuator_group: "Valuator group created successfully"
+        vote: "Vote created successfully"
       save_changes:
         notice: Changes saved
       update:
@@ -35,3 +36,4 @@ en:
         topic: "Topic deleted successfully."
         poll_question_answer_video: "Answer video deleted successfully."
         valuator_group: "Valuator group deleted successfully"
+        vote: "Vote deleted successfully"