Fix some Markdown leaking into note titles

www/js/Note.class.js

@@ -220,7 +220,7 @@ class Note {
                 title = "New note";
             } else {
                 title = this.content.split('\n')[0];
-                title = title.replace(/[\*#_`]/, "");
+                title = title.replace(/[\*#_`]+/, "");
                 title = title.replace(/^- \[[x ]\] /i, "");
             }
         }