further refactorings, got rid of init.js

src/public/javascripts/services/note_detail.js

@@ -395,6 +395,10 @@ $(document).ready(() => {
     $noteDetail.attr("tabindex", 2);
 });
 
+// this makes sure that when user e.g. reloads the page or navigates away from the page, the note's content is saved
+// this sends the request asynchronously and doesn't wait for result
+$(window).on('beforeunload', saveNoteIfChanged);
+
 $(document).bind('keydown', "ctrl+return", executeCurrentNote);
 
 $executeScriptButton.click(executeCurrentNote());