removed all onclick handlers from index template

src/public/javascripts/dialogs/note_source.js

@@ -1,6 +1,7 @@
 "use strict";
 
 const noteSource = (function() {
+    const $showDialogButton = $("#show-source-button");
     const $dialog = $("#note-source-dialog");
     const $noteSource = $("#note-source");
 
@@ -51,6 +52,8 @@ const noteSource = (function() {
         e.preventDefault();
     });
 
+    $showDialogButton.click(showDialog);
+
     return {
         showDialog
     };