[scrobbles] Add dynamic forms for LogData classes

vrobbler/templates/base.html

@@ -329,5 +329,21 @@
         </div>
 
         {% block extra_js %}{% endblock %}
+        <script>
+        (() => {
+        'use strict'
+        const forms = document.querySelectorAll('.needs-validation')
+        Array.from(forms).forEach(form => {
+            form.addEventListener('submit', event => {
+            if (!form.checkValidity()) {
+                event.preventDefault()
+                event.stopPropagation()
+            }
+            form.classList.add('was-validated')
+            }, false)
+        })
+        })()
+        </script>
+
     </body>
 </html>