HandleQueuedNotice: Handle a queued notice at queue time (or immediately if no queue)
- &$notice: notice to handle
+StartHtmlElement: Reight before outputting the HTML element - allows plugins to add namespaces
+- $action: the current action
+- &$attrs: attributes for the HTML element
+
+EndHtmlElement: Right after outputting the HTML element
+- $action: the current action
+- &$attrs: attributes for the HTML element
+
StartShowHeadElements: Right after the <head> tag
- $action: the current action