Reverted to the old removeChildren implementation.

assets/common.js/html.js

@@ -44,8 +44,8 @@ const $appendChildren = function(element, ...children) {
 };
 
 const $removeChildren = function(element) {
-    while(element.firstChild)
-        element.firstChild.remove();
+    while(element.lastChild)
+        element.removeChild(element.lastChild);
 };
 
 const $fragment = function(props, ...children) {