localize composer toggler help text

app/assets/javascripts/discourse/templates/composer.js.handlebars

@@ -19,7 +19,7 @@
   </div>
 
   <div class='control'>
-    <a href='#' class='toggler' {{action toggle bubbles=false}} title='toggle'></a>
+    <a href='#' class='toggler' {{action toggle bubbles=false}} title='{{i18n composer.toggler}}'></a>
 
     {{#if content.viewOpen}}
       <div class='control-row reply-area'>

config/locales/client.en.yml

@@ -331,6 +331,7 @@ en:
       undo_title: "Undo"
       redo_title: "Redo"
       help: "Markdown Editing Help"
+      toggler: "hide or show the composer panel"
 
     notifications:
       title: "notifications of @name mentions, replies to your posts and topics, private messages, etc"