SkinTemplateToolboxEnd available since 1.13 should be used instead.
Usage among extensions fixed.
'MonoBookTemplateToolboxEnd': Called by Monobook skin after toolbox links have
been rendered (useful for adding more)
-Note: this is only run for the Monobook skin. To add items to the toolbox
-for all 'SkinTemplate'-type skins, use the SkinTemplateToolboxEnd hook
-instead.
+Note: this is only run for the Monobook skin. This hook is deprecated and
+may be removed in the future. To add items to the toolbox you should use
+the SkinTemplateToolboxEnd hook instead, which works for all
+'SkinTemplate'-type skins.
$tools: array of tools
'NewRevisionFromEditComplete': called when a revision was inserted